Hi, RobSA!
If using glue doesn't solve your problem, what type of ActiveX controls are you using? Text boxes, command buttons, dropdown lists...
The issue arises in both Excel versions?
Regards!
EDIT: if you didn't change the default options of the control form from "Move, but not change size with cells" (or something alike) to "Move, and change size with cells", hiding the columns where the control is located would produce a stacking to the left.