Lunar Revel Skins [Client] Bug

As you all know, the Lunar Revel event allows you to unlock several skins for a very hefty discount. However I encountered something quite peculiar when I logged in to my account once more AFTER I had already seen the skins I unlocked. Surprisingly, two of the "cards" had reset, basically meaning I had to click on the "card" again to show me the skin I unlocked. The weird thing is, after it revealed what skin I had now gotten on sale, I was confused at the fact that it was no longer the same skin. The skin that I had unlocked had changed from 70% off Dragonblade Riven to 70% off Redeemed Riven. I was a little mad but Its not that big a deal. Hopefully we can get to the bottom of this mystery.