Hello I have been installing car alarms for 17 years. So I say this only to give credibility to my response and feedback. This is what I have learned from installing aftermarket remote start alarms/systems on newer Toyotas/Lexus vehicles. All newer Toyota/Lexus vehicles, makes and models all have this issue. When the remote start is activated, the door locks close. When either the driver door handle or the unlock button on the remote is pressed, the remote start shuts off. Its actually not an issue, but this is how the Toyota engineers designed the remote start to function. So actually the remote start works the way it was designed to work. Now concerning the issue with the range on the key fob/factory remote being only 10-20 feet. This is normal. Again this is the way Toyota engineers designed the range. Now if you want to add a aftermarket remote start to get better range and to let the car stay on when the remote start is activated. You will only improve one result. The range will definitely get improvement. Depending on the alarm manufacturer. You will get an extended range of 75feet and higher. And if you get the phone APP, then their is no range limit as long as your phone has cellular service your app will work from where ever you are. Now for the remote start staying on. The remote start will still shut off when you either open the driver door handle or press the unlock button on the aftermarket remote control or on the APP icon. This is because the way that the aftermarket "bypass/interface" module was designed. The aftermarket "bypass/interface" engineers designed it this way. They designed it after the factory design. I have to agree. This is an inconvenience. When I first installed a aftermarket remote start in a newer Toyota/Lexus I thought I had installed it wrong. I spent hours tracing all my work. Finally I called the alarm manufacturer and they explained to me that the aftermarket remote start was designed to duplicate the factory Toyota/Lexus features.