James Finn if you want to get up to speed on Medium, book a time with me to chat and I can walk you through things to make things easier.
Sounds like Quora is homophobic! I’d write a post about this, sharing their correspondence with you here or elsewhere.
And yes you can submit stories already published, but they will be listed by date. So if you want to republish to be current, cut and paste into a new article and submit.