Your experience is NOT NORMAL. I'd not know who you talked to. When I changed my TTX650 to Mode I the trim next to the elevator stick (former throttle stick), it moved the channel in the proper directions. When I reversed the channel, the trim still worked in the proper direction, so that when I reversed the stick's action, the trim action followed. So, "up" elevator on the stick and "up" elevator on the trim always matched. Something is goofy with your transmitter.