There is something that has ME 1 and ME 2 with the B side enabled.
Its not in Personality (what that setting is for is to split the row in half when using Split MEs or leave the row fully on one side and then switch between them)
Look in the ME SEL menu with your Programmable outputs which will show assignments -- and allow changing them. IN installation menu you have the menu that would allow setting them Flexi mode or forcing them to a specific assignments.
https://help.rossvideo.com/ultrix-acuity/Topics/Setup/Video/Output/Configurable-Output.html
https://help.rossvideo.com/ultrix-acuity/Tasks/Setup/Video/Output/To-Configurable-Output.html
https://help.rossvideo.com/ultrix-acuity/Topics/Setup/Video/Output/Split-ME.html
------------------------------
Les O'Reilly
Director, Switcher Product Management
------------------------------