You still have a major problem with the "accept" button being greyed out (can not activate it). Here's a simple suggestion. By default,when players search to join a MPC, only give the option to put in the amount to the player whos' game it is. Right now, it appears to be random, and both players are given the screen, which I believe causes the conflict. This problem should be a simple fix, yet it has persisted since the beginning of MPC.
Thank you for your consideration in this matter. I look forward to the fix in the comming years.