Okay, after looking deeper, I think the issue is the joystick wants to see 16bit for pan and tilt. The Accuspot 250 II is 8bit for pan and tilt with no option for 16bit pan and tilt. This might be the issue since it works sometimes and other times it doesn't. Is there an option to make the joystick 8bit instead of 16bit?
So patching error in my opinon at this point. The joystick wants to see channel 1 pan, 2 pan fine, 3 tilt, and 3 tilt fine. So that would explain why on the first fixture, no tilt, it is using the color wheel channel. Then the next fixture, some how it is patched so channel 2 (tilt for the Accu Spot) is channel 1. Then it is farther off with fixture 3, making channel 3 channel 1.
As for the channel count, they are 8 or 9 channel fixtures. If you want to use remote DMX addressing or RDMX, then they need 16 channels.
I would look into the controller and see if you can set what channels the joystick controls and/or switching it to 8bit. This seems to be the issue at this point.