I patched 100 generic RGB just to test MAtricks.
I selected 1 THRU 30 and looked at the grid. All good.
I pressed XWings + one time and a lot of unselected fixture numbers showed up. Only from the same fixture type.
10 THRU 30 is OK
9 THRU 30 shows wrong number
1 THRU 30 shows more wrong numbers.
('30' can change to whatever above 10)
It's only Selection Grid that is wrong, not the actual selection.