Kathrin and Guido are out of office, I think that they will answer when they'll come back.
You're rigth, it shouldn't be.... Maybe it should be good to unflag "allow posting..." in the transaction MMRV, when you really want to block the MM posting from the previous period. IT's an MM transaction, I'm not a specialist, and I don't know if you're allow to do it? See that with Guido.