Plugin page screenshots showing short description

Plugin page: https://wordpress.org/plugins/heat-trackr/

Everything is showing correctly except for the screenshots which is showing the short description instead. I’ve uploaded 5 screenshots into the assets directory screenshot-1.jpg, etc.

This is my readme:
http://plugins.svn.wordpress.org/heat-trackr/trunk/readme.txt

I used the example https://wordpress.org/plugins/about/readme.txt and edited it, I can’t see why it is not working.