It's happened before.
I think the record for the records not updating was around 2 months, and that was before a game update when Fury was released.
I think they have come to the conclusion that most of the new records will be from new players, and they are most likely going to break their own records, so let things run there course till things stabilize a bit, then fix them.

Plus you have some of the guys in the process of promoting 2048 at E3 and the others probably polishing it up and QA testing before release, so I reckon the updating of records is not going to be high priority as far as they are concerned.