Size tags have intentionally been disabled. I'll remove them from the editor to clarify that. They'll be replaced in the future by heading levels, probably in markdown.
'ul' is an 'unordered list', it shouldn't have numbers. However, if it doesn't have bullets, that may be a bug. Do you have any links demonstrating where this is occurring?
Thanks, this should be fixed once the CSS reloads / caches get cleared. This used to work, I think when I added in a reset CSS, it cleared that and I didn't notice.