I have bought numerous things in your store. When I want to buy a new offer, it takes time to check if I own some pack (For example, the 100 CC models are sold with Hair style, I am not sure to have it, I have to parse all the history to find it).
Here's my suggestions: From the online store, when I look at some products or bundles, you should add a sentence, or icon to say "you bought this content". ThemeForest is doing that and it is great.
From my account, all my products should be listed with the cover product and the title in a table. It is that hard to do.