Alright, so I'll transplant this into a bigger pot.. I know you're not a fan of the 10" pots I have so I'll try one of those black 5 gallon ones and see how it goes.
I'm also going to very delicately try and separate these 2 plants.. I had some Anaheim peppers that were 4 peppers in 1 pot that I was able to successfully separate them. At first the ones I removed didn't look very good and within 10 minutes the leaves wilted but by the end of the day they were back up and looked strong and normal, so I guess they'll survive.
Also yesterday I saw a VERY weird bug on the stem of my Tabasco plant under a leaf. I don't think I've ever seen a bug like this before.. https://goo.gl/photos/M2gWGKT62c26kzeC7
I flicked it off and it didn't fly or run, it hopped. I sprayed it with the insecticidal soap and it died.