MDA Does not respect SFDC Account Merge

I had an issue come in where a fairly big client that does SFDC Account Merge fairly frequently. In SFDC, after a merge all of the loser Account IDs through lookups in objects gets updated to the Master which is good. However, I found out that the MDA would still look at the old ID making a big chunk of data disappear of reports.

I feel this could be a big problem as we are storing MDA such as relationship scorecards, email logs, and a lot of other things. For the client that had this issue, they didn't even know it was happening.

Kevin