Sudden duplicates of volumes (10.13.6)

Hi there, my MacPro 5,1 (10.13.6) ran smoothly until a few day ago. Emptying trash with only a few Kb took a minute and then I noticed that my Nvidia prefpane was missing in the top toolbar. The Cuda prefpane was accessible in the prefpanes but the Nvidia Driver Manager wasn't. Investigating further and I then noticed that most of my connected volumes got copies. The original volumes got an 1 behind their names.

After some searching I found this thread: https://superuser.com/questions/657295/osx-duplicated-and-re-numbered-my-drive-in-volumes

I went through the process and now only my startup volume shows up as an alias in /Volumes but not on the desktop. I can control click and Show Original. The symptoms described above are still there. Here's the EtreCheck report:

How can I fix this? TIA Edit: typo.