expiration of system object backup

[enoughisenough]

I'm new, and I'm also a blond, so don't be too hard on me if this question is something of common knowledge.
In my management class I defined to keep 2 versions of backup. I backup all drives and system objects, but expiration process does not delete old versions of system objects. What could be the reason?

 

[enoughisenough]

What, am I the only one who backs up system object, or am I the only one with this problem?!

 

[comtec17]

What are your settings for versions exists and versions deleted?

P.S. You are one of the very, very few who use TSM any more.

 

[enoughisenough]

Versions exists 2, version deleted 1. I repeat, I backup also all local drives, and for them expiration process deletes old versions as it should. Why doesn't it work for system object, concerning they are all under same management class (there is only one, in fact)?