Chosen Solution

So whenever I go on to my dial pad, my phone just starts to randomly press keys numbers, and then sometimes presses the Dial icon. How and why does this happen?

Bad replacement screen. Either was forced in a dented iPhone housing or faulty.

I do not know if this is your prob but the prossessor for the touch screen breaks loose from the board if you put it in your back pocket. they fixed this issue in the next model.