Full backup information is "forgotten"

Hi all,

I have ran into a strange issue with DP 7.01.

I am doing full + incremental backups using the same datalist. 1 full / week, rest of the days running in incremental mode.

I noticed that when I try to restore a folder it requests 50+ tapes as it is reverting to one full backup from January and adds all the incrementals on top of that. Full backups run fine every week, still it reffering to the old January backup.

Full backup is very slow - one ~ 4TB dynamic disk. 

Some details:

Cell server - win2003, DP7.01

Client - win2008, DP7.01

Backup goes directly to magnetic tape, no copy session.

Are there some settings to be done specially for dynamic disks backups?

Thanks for any reply.