I might have been playing a bit late into the night over the past few days, enough that I got sleep-stupid, and it wasn’t until the morning that I noticed my run ended up with more mutations than the number of strains I had “unlocked”. I wasn’t entirely sure how this happened when I finished that first run, but after starting a new game with my unlocks I decided to try and figure out what happened.
It took a bit of thinking, but I was able to reproduce the actions which granted extra mutations. I tried to carefully read the messages which appear on the mutation screen, and I must be having too much blood in the wrong head because I can’t tell if this is actually an exploit/bug. I won’t publicly post the steps, but I did take a screenshot of how my second run is going so far which amply demonstrates the result.
So… is this behavior intended?