Move missing option ( V7RC1)

situation:

Two forums  new and old,
in new there are 3 topic, topic-A, topic-B and topic-C,

I move only topic-b to old 
result:
- in forum old there is one topic-B
- in forum new you see topic-A, moved:topic-B and Topic-C 

after a while I "Batch Move Topics" all topic form new to old
result:
- in forum old you see topic-A, topic-B and Topic-C 
- in forum new you still see  moved:topic-B  

Q: how to get ride of  moved:topic-B 

What I miss:

In the admin section a option to remove the moved:topics based on date eg 7 day old (no move date in database so probely no option, but start date of topic is oke) selection on: all forums, categorie or single forum

Hans