We're using a bound binding list which contains other binding lists - so the data in the grid is in parent rows with child rows.  Both are custom lists.  We've bound the parent list directly to the grid's datasource.  I am able to reproduce an issue where the contents of the grid rows actually do not match the contents of the list (when the list is still bound). 

First, I'd like to confirm with the experts that this is not supposed to happen, and that if this happens, I'm chasing a bug. 

Second, I'm hoping you might have seen such issues previously, and have suggestions on where or how I should look for that bug. The failure is silent - no exceptions or errors raised anywhere.  Is there perhaps a diagnostic or debug or logging mode I could use to see if there's an error occuring in the grid code related to this issue?

A couple of additional clues are that this error only occurs when the child lists shrink - when items are removed.  And I have found that the workaround of explicitly refreshing the rows collection by reloading the data corrects the issue.