Hi, the glass shower subcontractor cut a notch into the limestone top of our shower pony wall rather than cut the glass to fit around the limestone. Is this usual? He said they couldn't notch the glass at the place where it would curve around the pony wall.

I'm sad that my limestone was notched, and wondering if this is something I should insist gets replaced now, and the glass done differently. Or maybe this is always how they get the glass to wrap around pony walls?