Also some (maybe) useful info - the double vertical group issue position recording glitch only happens when I have the Super Text Mesh component enabled. If I disable it and enable Text Mesh Pro on the object, the double nesting doesn't seem to be an issue with recording. Hopefully helps with troubleshooting.
The script you sent - what object should I put that on? I didn't seem to get fields in the inspector when I attached it to eg the STM object, I'm not a code expert by any means, but it looks like I should have got some public fields to drag objects into? Even a more basic question, but should it be a CSharp script or a Mono?