I have several MyColors themes (Ankh, Music, Pirate
I understand that you had the MyColors versions of those. At a later point in time, Stardock added the standard non-MyColors versions of those to the My Products page. (That's what Gaspershooters was referring to in Reply 1). I don't know if there may have been some criteria, such as an active OD subscription at a particular point or a time frame since the MyColors purchase, but there was no need to buy the themes again. So if you haven't thoroughly looked through your entire My Products page for them, I encourage you to do so, I would expect those to be there. Again, scroll through the entire page. You're looking specifically for:
Premium Theme Ankh
Premium Theme Music
Premium Theme Pirate
Premium Theme [any other non-branded MyColors theme you bought]
If they're not there, then I'm afraid I'm as confused as everyone else. I hope they are, good luck.