OCX Updating. Why need to remove, save, then re-add to make work each time

So I am making some OCX’s. Primarily to wrap the date picker, progress bar and listview. 3 controls Microsoft keeps wrecking on us in our VBA environment. I have compiled them into a VB6 generated OCX.

However, each time the OCX is recompiled (feature creep). The properties of the control just disappear. You need to go into the VBA project, delete and re-add the custom controls for them to work again. Is there a reason this is so, can I fix it? Maybe something I need to set in the VB6 compiler to make them properly update older versions?