User blog comment:Pappa2eco/Theodore's Treasure - Purchase Failed/@comment-5212810-20130211054450

Is this occurring when you are collecting? In the past two weeks 3 expensive dinos have appeared in my breeding den without my having purchased them. Nor has there been a pop-up. (Alas they were dinos I already had not exciting new ones...)  I think the lack of pop-up is related to server lag. and then while the server is lagging if one keeps tapping on the same spot - one purchases a dino without knowing it. Literally I've gone to the dino den to purchase a random dino, only to find it occupied already.

Also,  I sometimes will get the Your purchase has failed message as well when collecting and I've assumed I accidently tapped on the coins or diamonds button while collecting. I have app purchases restricted to prevent accidental purchases.

I feel the server lag issues are worse recently because prior to the last few weeks I've never accidently purchased a dino before (or gotten the message that I don't have enough crystals for the dino.)

I don't know if this is related to your issue but it is something to consider.

I did do an uninstall reinstall but that actually made the device more laggy not less, but that may be because of the upgrade involved when reinstalling.