This one is driving me nuts. More and more updates, sometimes for the exact same devices... come out and I have to patch repeatedly for the same issue. Random example being our load balancers, Patch 2.005 (random number) Fix: heartbleed. 30 days later: Patch 2.006 Fix: Heartbleed: Patch 2.007 Fix: OpenVPN / Heartbleed.
I wouldn't be 1/2 surprised that this is part of the problem. Seems that most companies still haven't figured out how deep this rabbit hole goes.