I have a total of 17 Injury salves now. I only know this because I acquired a new one. When my inventory was opened while accessing the chest the new ones were in, I could see a stack of 17 injury salves. Any time my inventory is opened afterward, I see no Injury Salves at all. I can create them in a fireplace, but I cannot equip them.
Nevermind, I found a tab that stores these items. I also figured out how to find previous bug reports I had made.