Active x Combo Box - Help !!!!

[gyckl]

Hi
I've built a form for our sales team in Excel that has Active x Combo Check boxes that they can tick to select certain products.
However, once i've ticked one of the boxes more than once they start to increase in font size to a stage where they are huge and unreadable.
This may be some sort of bug in Excel i'm not sure.
Has anyone had this before or know how to fix it - it giving me a massive headache!!!
Any help much appreciated
Cheers
Chris

 

[Sektor]

1. Right-click checkbox
2. Format Control
3. Properties
4. Don't move or size with cells