I'm sure this has happened to a few of you out there, including my self not more than 5 minutes ago. While playing an extremely good round in a Armour Squad on Kashan, while waiting to re-spawn I went to check the squads we had when
BAM, I clicked to high and I was put into the other team

After 2 great hours with a bloody excellent set of squad members I was put onto the other team, and couldn't return to my original team

.
My suggestion to fix this is as simple as it can get, when selecting teams have a small pop up type box appear and ask you something along the lines of 'Are you sure you want to change teams?' or ' Are you sure you want to make this change?'
This would solve the problem and not stuff up someones game like it did mine and most likely many people out there.