Just tested it for the glitch, and it doesn't occur...well, at least with the following circumstances anyway:
-Version 0.0.7a, Brainiac Arithmetic
-11 examples incorrect (don't know if I need to get more wrong)
-Less than 10 notebooks collected at any point (don't know if the final chase behaves differently)
-Tested with <3 and >2 notebooks
-Used muffins (don't know if that affects it)
To truly test it properly, I'll have to recreate the circumstances you were in, but for now, screw it. I have better things to do. Bye.