Exposed Fasteners on Standing Seam Flashing

M M
10/7/2017
I recently had a standing seam metal roof installed. Installer was recommended by manufacturer and proposal said concealed fastener metal roof. The fasteners are concealed on the panels but I see screws in the valley flashing, that I didn't notice at first. I've already paid him so I'm not sure if there is much I can do. Is this standard? Will I have to worry about screws backing out or grommets wearing away? I was under the impression that all fasteners would be concealed. I can attach pictures if needed.
Todd Miller
Classic Products, Inc.
10/8/2017
Please attach photos so we see what was done. I think I know but I want to make sure.

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