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Simple restore problem

Created: 08 Jan 2008 • Updated: 02 Mar 2009
I think my problem is simple but lack the know how to fix.
I'm doing 1 weekly full backup and daily differentials for quite a while to a huge hard drive with plenty of space.  However, when I go to a restore job, I only see one month at a time and sometimes bigger gaps.  On another server when I go to restore I see day-by-day which is the way it should be.
Any suggestions? 
Running 11d on Server 2003 SP2 R2.