RE: How to post like a pro - Complete guide to Markdown formatting

When using the centre option, everything following will center, even when /Center is used.

This isn't really true, but there are some oddities that do cause a center to be unclosed. But most cases <center></center> works fine.

emphasis and bold star * codes don’t work after punctuation, so the * must be placed before the period, question mark, or whatever.

Sure they do. You just can't have a space between it.