I believe they have all been correcting checks as the "write corrections to parity" box has been check marked this whole time and I have no memory of ever changing this setting.
Parity check history screenshot attached. Looking at the numbers, the errors seem to have started in January 2020. I'm trying to remember what settings I may have changed at that time but nothing is coming to mind.
All of my data has been there and I haven't noticed any errors in actual use. I use the server for Plex most of the time, as well as a NAS where I connect to it to download and upload files from my computer through the network.
Some more info that could be useful:
1x 8TB Parity drive
3x 4TB Data drives
1x 120GB Cache SSD
1x 16GB USB Boot drive
The only dockers I use are Plex, DuckDNS for my Wireguard VPN and Krusader for moving some files around internally.
Also the SMART report for all of my drives has consistently shown a "healthy" status, for whatever thats worth.