Markdown does not work

##test## does not work but ## test ## works… so it works fine now.

I think your extra #’s on the end are superfluous. It works fine for me by entering the following:

# Heading 1
## Heading 2

official doc for markdown states that # should be at the begin. and end.
Problem was that markpad accepted ## with no space, but jetpack requires ##[space]something[space]##

You can any of the methods described in the original syntax documentation here:
https://daringfireball.net/projects/markdown/syntax#header
https://en.wikipedia.org/wiki/Markdown#Example

For an H2 heading, any of these will work:

This is an H2
-------------

## This is an H2

## This is an H2 ##

You’ll consequently need the spaces for Markdown for be parsed properly.