There seems to be glitch wherein if you opt to take breakfast in your room you can't change it back to having breakfast with Terry.

Weird! I'm having trouble reproducing this. What do you see if you talk to Meg about breakfast in the servants' office? Do you see the other breakfast options there?

It seems to just repeat itself, I select Could we discuss a change in breakfast routine? And then the only currently available options, as I've recently restarted, are I'll take it in my room, and You pick the menu. No matter how many times I select either option neither change. 

At the moment, the available options don't change based on what routine is active; I'll change that in an upcoming release. In my testing, once you do choose, "You can pick the menu," you should get breakfast with Terry the next morning. I'll keep investigating to see what's going on! If you're willing and able, it would help me diagnose it if you send an affected save file to phanes@phanes.me (on Windows, save files are stored at: %APPDATA%\RenPy\RuinMe-1537207983 ). Either way, I'll try and track down what's going on!

Ah okay, that might be my mistake then, apologies! I'll go ahead and try and send that your way though. Thank you very much!