Why is my Dialog box so small when running my script?

See here, the sliders are much smaller in the default settings.

image

I can’t quite understand it, I’ve looked at other lua scripts and can’t see anything about specifying the size of the Dialog box, and yet, theirs are properly proportioned, and the sliders aren’t a fraction of the dialog space. My script is visible here.

I’ve had to manually add the Dialog.bounds() function to at least get the sliders appearing normally.

Am I missing something painfully obvious?