1941 Walking Liberty Half PCGS Submission Disappointment. Where Did This Go Wrong?

I haven't actually received them back yet, but will in a couple days. Where would I find that explanation? Do they include something in the box?

My best guess are the black mark by liberty and around the rims. Doesn't look bad but that's the only thing I see wrong from the pictures.

I think this may be the damage PCGS noted.

FC, is that called damage because it's otherwise an unc coin? Would that be considered damage on say an XF or AU coin.

And is this also a difference in how the this series is graded compared to say Morgan's for example.

This is just my best guess. PCGS must have seen something and this is the biggest thing that caught my eye. They may have thought it isn't a bag mark, doesn't look like a minor circulation contact, and so must be damage. Their 98 code includes "any form of metal movement, either intentional or accidental." There clearly is some metal movement here, and it is in a central location on the obverse. It doesn't mean I agree with it, but that's the most I saw on my first look.

EDIT: PCGS also lumps corrosion spot removal under their 98 code. There are a few places where there is discoloration or luster disruption on this coin, but I don't see evidence of corrosion. Maybe they saw that differently. The areas I noticed were (1) the spot above Liberty's head on the rim, (2) between the top of the seventh sun ray and Liberty's gown, (3) on Liberty's upper right arm, and (4) the area above the stop between the "F" of HALF and "D" of DOLLAR.

Maybe that particular grader was just having a bad day at the office?