Reinstalled files not found

[Elephen]

I have very little experience playing music files via UPnP. MinimServer initially recognized the albums and music files on my Synology NAS, which is running version 2.0.18-1005. When I noticed that some of my metadata was changed on an album (see below), I deleted and reinstalled that album on the NAS. For some reason, MinimServer still can't see that albums or its files. On the other hand, MinimServer sees the newest album that I added to my NAS.

FYI, as I recall, MinimServer changed quotation marks into dashes. I'd like to see a list of punctuation marks or symbols that aren't permitted in metadata. Thanks.