2003 Toyota Corolla

Hi there, I have a 2003 toyota corolla and I have recently installed a remote car starter, I have noticed that when I use the remote starter my cranking is too long, so I brought it back to the installer, after I park my car into his garage and turn it off, my car wont start anymore. He checked all the fuses but everything is okay, whats happening is when you put it on Start(crank) position its only making a humming sound from the back(i think its the fuel pump, but is it the fuel pump only engage in ON position?) Anyway after like ten tries it started, but the following morning it wont start anymore, he said he encounter this before from GMs but not with toyotas, he said my ignition cylinder is shorting(like the ON position is shorting the Start(crank) position. Also I can pull out the key even in ACC, ON, and Start. Any suggestion I really appreciate it. THANKS A LOT