I think I found a bug. I am using an iPhone 5s with the latest software. The CV Drills software is up to date. I use the drills in two ways. First is the Flash Drills for a 6 deck game. I also practice the counting drills, but I set it to 1 deck in order to keep the drills shorter. If I go back to the flash drills I set it back to 6 deck so that the strategy for play is correct. But I found that the tables don't change to 6 deck. For instance, the if the flash drill presents 8 v 5 and I select Hit I get an error showing DD. It will say 6 deck in the Flash Options but the tables will be wrong. If I leave the app and go back into it then the tables are correct.