I have a few things that don't show up. I bought them in bundles. Vendor "gifts" -- as in some BOGO sales, also don't appear. But then they also don't appear in the purchase history, either because, well, they weren't actually purchased. Other than that, I've never noticed a problem, except during those "grab bag" sales.

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PoserPro 2014, PS CS5.5 Ext, Nikon D300. Win 8, i7-4770 @ 3.4 GHz, AMD Radeon 8570, 12 GB RAM.