Game Development 2 - Pair Game

I found a new script for the matching card game, and it worked well on the frame after a little bit of tweaking the code. However, there is still an error when I tried clicking back to the previous page with the game on page 4 displayed, but cannot be disabled when going back to the previous page or the next page. Since the problem still occurs, therefore I keep going back to the old script to make the tile disappear when the same tiles are matched. I put the solution behind the game after the game is played. I put in a movieclip to show the arranged new duty roles for each characters. 

I still try my best to solve the problem although I had plan B for it.