I have experienced both of these issues as well.
The QB spontaneously throws the ball to the receiver on the left without the user tapping the screen. Even when you deliberately avoid tapping the screen and do not try to control the QB dropping back, the QB chucks it to the left which is almost always incomplete or intercepted. Seems to not happen on PA passes, but does occur with any pass play. For a while I thought it was only long passes, with WR streak routes, but it is happening more frequently and on all non-PA pass plays. It does not matter which QB you have in your lineup. It is impossible to win matches against higher level competition. Very frustrating!!! Help EA, Help!!!!!