I hooked the motors back up this morning, and with the aileron servos disconnected they seem to work fine...unlike before, when they turned on and off erratically by themselves. Although I'm totally new to all of this, it seems to me that if you have a bad servo (two, in my case), it can cause everything else connected to the receiver to go crazy? If this is true, I can imagine some spectacular maneuvers should a servo fail while in the air - followed shortly by positive contact with the ground! Should this happen I don't know that the correct response would be, but I would be inclined to turn off the TX, and hope for the best.
I did have to turn on the reverse switch to get the proper throttle response. I don't know what's up with that, but I guess it's no big deal. I went through the ESC arming procedure as you described.
Thanks again for your help.