Bug: BP-Social Theme. Forums. Ugly formatting.

My forum page is badly formatted.

Having asked here: https://premium.wpmudev.org/forums/topic/buddypress-social-theme-forum-page-formatting-and-bullets#post-445882

Was told to use this CSS:
#bbpress-forums .bbp-forums-list {
border-left: 0px !important;
margin: 0 0 0 15px !important;
padding-left: 0px !important;
}
#bbpress-forums .bbp-forums-list .post-content ul li ul li {
background: none !important;
padding-left: 0px !important;
}

It didn't work. Makes no difference at all (although it applies, as I can see in browser dev tools the rule has 'been read', just doesn't affect text.)

Any further ideas?

I've started a new thread as old one has become 2/3 related issues I will separate out.