Thank you!

Underline does work. You are probably viewing it on Ecency?.
But this is what it shows on Peakd for example.

I tried to leave out what doesn't work on Ecency, but Underline is nice and shouldn't be left out.

I'm assuming Ecency is messing up how the whole post is viewed on a mobile device too. (It breaks images and alignments on smaller screens, so the whole post might look like a mess.. Except tables, which what I'm assuming is the case)