I posted on the game wall several weeks ago and emailed Com2us about this after it happened to me three times. I notice a bunch of very close calls NOW, especially when you are trying to accept a visitor, and another visitor is right beside or under the first. Both pop up with the option of "accept or reject", and there will usually be a tree under it all that I am about to powder with the next touch! The people at Com2us assured me that they were working on the issue and it would be coming soon on an update. That was SEVERAL weeks ago and TWO updates later! Maybe we ALL need to shoot them an email! The address is
info@com2us.com...they will need to know your iOS device type and version; your usernamer; and what version of the game you are using.
Hopefully, they will get tired of hearing the complaints and put in the fix! As is, I am VERY cautious when touching that screen right now! I hope this helps!