Last week (I think) on the call you mentioned the process is not complete until the .dat files clean themselves up. They used to, but don't seem to be doing so now.
the turned off the dat file delete. There is something in animated gifs that has a timing issue with those deletes.
just wait about 15-30 seconds after the effect finishes and create your sequence.
you will need to clean out your effects/workspaces/{member_id} directory if you get too many.
i will work to fix the temp file cleanup after Christmas
for now everything will work and you will just be accumulating dat files until u manually delete them.