SharePoint 2010 List - Append Changes to Existing Text - multiline text fields being duplicated

Hello!

SharePoint 2010 - I have this same problem for all Lists that use the combination of 1) Multi-line text column; 2) Column is set to "Append Changes to existing text"; 3) Text choice = Plain Text or Rich Text or Enhanced Rich Text. 4) List item is modified in datasheet view

Each time a list item is modified in datasheet view, if the multi-line text column is left blank it will have it's previous value duplicated. For example - If I'm updating a list item in Datasheet View and updating a column other than this column I described above, each time I make an update to the list item the previous value/comment left by someone else in that column will be duplicated with my name attached along with the date.

Why is SharePoint duplicating the contents of this field??

Example:

Comments (multiline text column): Comment 1
Miguel Patey 10/3/2011 2:12 PM

Comments (multiline text column): Comment 1
Miguel Patey 10/3/2011 2:10 PM

Comments (multiline text column): Comment 1
George Pully 10/1/2011 8:45 AM

In my testing I noticed that a list item that is modified in standard view (not datasheet view) will not duplicate the value of the Comments field if left empty. Once the item has been modified in standard view I can make changes to that list item in datasheet view and the Comments field won't be duplicated...

Any ideas?