Yeah it didn't seem right to me either. I tried adjusting the trim while in the menus and that didn't work. So then I exited the menus and tried adjusting it using the exterior buttons... still not enough throw. Very strange.
I'm recharging the battery now, when that's done I'll calibrate the ESC and play with it again, if I can't get it to center I'll take a quick video so you can see what i'm doing.... make sure i'm not doing something stupid before messing with the linkage.