Gem Store Tooltips Fail to Note Known Skins

Looking through the Promotions tab and mousing over the mount skins, I am disconcerted to see that while the Umbral Demon Skimmer Skin has "You have already unlocked this mount!" in the tool tip, the Magnificent Hummingbird Skimmer Skin and Sun Temple Gecko Springer Skin do not, although I have had both of those for some time and only got the Umbral yesterday. (The Grand Lion Griffon also has the correct information, so perhaps it is only Hummingbird and Gecko affected).

I am not going to mistakenly buy them again, but I imagine some people might waste their gems.