Those are new problem sets that haven't gone up for sale on the add-ons page yet. All the problem sets you paid for in the ultimate package are now at the bottom of the curriculum portion of the syllabus right before the PTs start, in a category called "Old Problem Sets". As an ultimate package subscriber, you now also get access to most but not all of the new problem sets. They have talked about making another tier or at least a package add-on to unlock those for people that want them. Hope this helps clear that up, don't worry you didn't lose anything and actually gained a little bit, though not all the new stuff.
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