That is very interesting. I will certainly investigate this. It may actually have something to do with the issue of exchanging tiles, which, I haven't had a chance yet to investigate. I should have some time this coming weekend to figure it all out. sorry for the trouble, I hope at least the score is going in your favour.
Appreciate the prompt reply. YES... I think you're onto something about number of tiles being inaccurate because of trading tile attempts. I'll remain hopeful that you can fix it for us.
Ok, I had a little time this evening to look into the issue. Just as I suspected, the two issues were linked. I've fixed the "Trade Tile" feature so you should now be able to get new tiles instead of the same old ones that you were trying to trade. In my testing this did cause the number of tiles in the bag to increase as tiles were traded. I have resolved the issue and released an update so you should be prompted to install the update next time you play a turn.