Active X Combo Box moves when the drop down arrow is selected

[Mike UK]

I have an Active X combo box in a spreadsheet. When you click the drop down arrow on the right, the whole combo box moves a few millimetres to the right and down. You then have to re-select the drop down arrow to select one of the data items.

Any idea why the Combo Box moves when selected? Sorry I couldn't paste in a picture to show the effect.

 

[Kamolga]

Play with properties "move and size with cells", but keeping it unchecked should stop the problem
Otherwise type of view can have a bad effect (bottom right of the screen next, left of the zoom).