Good game but right side is wrong

I like this app a lot, but sometimes on the right side when I get a strike and a pin is in the gutter, the mechanism picks it up and negates my strike! It has happened at least six times with me, and I end up trying for a spare when I already had a strike. Very disappointing... Otherwise, I like it. Since I had shoulder surgeries I cant do regular bowling so this fills the gap a little. Thanks!

Grand Puba the Great Potentate about Galaxy Bowling HD, v10.4