Studio Color 250 randomness

Hey guys, I am new here, and I am mainly posting because of a problem I am having with a Studip Color 250 (I know they are discontinued). We have four of them in the youth facility at my church, and three of them function perfectly but the middle/stage left one has one little thing wrong. When I run the middle color wheel on the console (a GrandMA Light) instead of mixing to magenta and then inserting the red flag, the red flag comes up and then the unit mixes to magenta and back to white. In other words it is running in reverse. The console is set the same for all fixtures, and as far as I can tell the software is all set the same. I even took it apart to make sure everything was installed right on the inside.

Anyone have any ideas?

Help!

Mike
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