Odd Button Sizing?

I’m working on a rearranging some window layouts on an older project.

If I add a new generic button from the Library, it’s height is set to 20 and looks like what I expect. If I change the height to 24 via the Inspector, the button’s visual width gets narrower, even though it’s .width hasn’t changed.

I’ve also found that using the drag handles to change the height of the button doesn’t change it’s visual height, even though it’s .height does change.

To make it even more interesting, some buttons get shorter when I run the project than they show when working in the IDE.

Am I misunderstanding the way the IDE works? Is there some setting I’ve forgotten to toggle?

I’m working in OS X, with RS2014r3.2, I don’t remember this being weird in older versions of Xojo.