I've created a really simple pagination with search box and created a simple VF page with inline editing on the fields.
Now,depending on what I do between filling in a value in the field and clicking the Save button,it will affect whether the new value is saved or not.

So if I double click on the Last row, amend value, hit enter.The text turns orange and I get the undo icon as expected and Save, it saves the record.But when I edit and click Save for the previous records, the value goes back to its OLD value and is not updated.


Page :

public class PagingTasksController{

    public List<Task> tasks;
    public Integer CountTotalRecords{get;set;}
    public String QueryString {get;set;}
    public Integer OffsetSize = 0;
    private Integer QueryLimit = 3;
    public List<Task> lstTasks;
    public String searchText {get;set;} 
   
    public PagingTasksController (){
        //CountTotalRecords= [select count() from Task];
    }
   


    public List<Task> getTasks(){
        if(tasks == null){
            tasks = new List<Task>();
        }
        return tasks;
    }
   
    public void findTasks(){
        String qStr2 = 'Select count() from Task where Subject like \'%'+searchText+'%\' OR Status like \'%'+searchText+'%\'';
        CountTotalRecords = Database.countQuery(qStr2);
        queryTasks();
    }
   
    public void  queryTasks(){
        String qStr = 'Select OwnerId,Subject,Status,Priority from Task where Subject like \'%'+searchText+'%\' OR Status like \'%'+searchText+'%\' Order By Subject,Status limit ' + QueryLimit + ' offset ' + OffsetSize;
        tasks = Database.query(qStr);
        tasks.sort();

    }

    public Boolean getDisablePrevious(){
        if(OffsetSize>0){
            return false;
        }
        else return true;
    }

    public Boolean getDisableNext() {
        if (OffsetSize + QueryLimit < countTotalRecords){
            return false;
        }
        else return true;
    }

    public PageReference Next() {
        OffsetSize += QueryLimit;
        queryTasks();
        return null;
    }

    public PageReference Previous() {
        OffsetSize -= QueryLimit;
        queryTasks();
        return null;
    }

   public PageReference save() {
        update tasks;
        return ApexPages.CurrentPage();
    }
   
}

<apex:page controller="PagingTasksController">
    <apex:form >
        <apex:pageBlock title="Tasks" id="pgBlock">
           <apex:pageBlockButtons >
               <apex:commandButton action="{!save}" id="saveButton" value="Save"/>
               <apex:commandButton onclick="resetInlineEdit()" id="cancelButton" value="Cancel"/>
           </apex:pageBlockButtons>
    
        <apex:inlineEditSupport showOnEdit="saveButton, cancelButton"
                    hideOnEdit="editButton" event="ondblclick"
                    changedStyleClass="myBoldClass" resetFunction="resetInlineEdit"/>
    
       <apex:inputText id="searchBox" value="{!searchText}"/>
        <apex:commandButton value="Search" reRender="pgTable,pgBlock" action="{!findTasks}"/>
        <apex:pageBlockTable value="{!Tasks}" var="tsk" id="pgTable" >
   <apex:column >
  <apex:outputLink value="{!URLFOR($Action.Task.Delete, tsk.id,['retURL'='/apex/task_test'])}" >Delete</apex:outputLink>
</apex:column>
          
                <apex:column value="{!tsk.Subject}"/>
                <apex:column value="{!tsk.Status}"/>
                <apex:column value="{!tsk.Priority}"/>
                <apex:column value="{!tsk.OwnerId}"/>
            </apex:pageBlockTable>
            <apex:pageBlockButtons >
                <apex:commandButton value="Previous" action="{!Previous}" rerender="pgTable,pgBlock"
                                    status="status" disabled="{!DisablePrevious}" />
                <apex:commandButton value="Next" action="{!Next}" reRender="pgTable,pgBlock"
                                    status="status" disabled="{!DisableNext}" />
                <apex:actionStatus id="status" startText="Please Wait..."/>
            </apex:pageBlockButtons>
        </apex:pageBlock>
    </apex:form>
     <apex:enhancedlist type="Activity" height="800" rowsPerPage="50" customizable="False"/>
</apex:page>

    
Class :


public class PagingTasksController{

    public List<Task> tasks;
    public Integer CountTotalRecords{get;set;}
    public String QueryString {get;set;}
    public Integer OffsetSize = 0;
    private Integer QueryLimit = 3;
    public List<Task> lstTasks;
    public String searchText {get;set;} 
   
    public PagingTasksController (){
        //CountTotalRecords= [select count() from Task];
    }
     public List<Task> getTasks(){
        if(tasks == null){
            tasks = new List<Task>();
        }
        return tasks;
    }
   
    public void findTasks(){
        String qStr2 = 'Select count() from Task where Subject like \'%'+searchText+'%\' OR Status like \'%'+searchText+'%\'';
        CountTotalRecords = Database.countQuery(qStr2);
        queryTasks();
    }
   
    public void  queryTasks(){
        String qStr = 'Select OwnerId,Subject,Status,Priority from Task where Subject like \'%'+searchText+'%\' OR Status like \'%'+searchText+'%\' Order By Subject,Status limit ' + QueryLimit + ' offset ' + OffsetSize;
        tasks = Database.query(qStr);
        tasks.sort();

    }

    public Boolean getDisablePrevious(){
        if(OffsetSize>0){
            return false;
        }
        else return true;
    }

    public Boolean getDisableNext() {
        if (OffsetSize + QueryLimit < countTotalRecords){
            return false;
        }
        else return true;
    }

    public PageReference Next() {
        OffsetSize += QueryLimit;
        queryTasks();
        return null;
    }

    public PageReference Previous() {
        OffsetSize -= QueryLimit;
        queryTasks();
        return null;
    }

   public PageReference save() {
        update tasks;
        return ApexPages.CurrentPage();
    }
   
}

Am I coding my inline edit incorrectly? Can you see anything unusual?