IDE problem & layout messiness

Just started last night, and I run into a problem with the web IDE where the first time I type, the cursor position shifts by a couple lines. This is a bug, but not sure how to report it. I have recorded a video showing what I mean (click to place cursor and when I hit space, it shifts two lines below)

The other thing is that on Firefox at least, once adding the Font Awesome icons to the buttons using bootstrap, the buttons don’t look good anymore. Yes, this can be improved with adding further styling to the classes, but that is not currently part of the tutorial series so it makes me feel like I’m making a wonky UI. Checkbox row isn’t smooth either.

I do appreciate all the hard work in the free resource, but just want to make it stronger.