Lynne, 

I also use Safari. The issue you describe falls in the ubiquitous "sometimes that happens" category. The game is littered bugs. Some are like Rich pointed out and others like Tcutt identifies when he completes the game using zero moves in zero seconds. It's all part of the wacky world of solitairecraving.com. Enjoy. 

Lynne

Sorry, but I have no answer.  I will say that often (but not always) when running in Chrome browser, I have what sounds like the opposite problem which in my case is left-clicking too fast on a card turns two cards in a row.  Other things I think many of us have noticed, is that somethings when you've completed a successful game it hangs up and you have to Reset or re-open to see how you did. 

Anyone else have any idea about Safari or FireFox issues?

Good morning - why does one card stick and refuse to turn over? I cannot finish a game when that happens. Safari OS 26.2   Also on Firefox.

Wow, Rich!

!