Gonna copy/paste my response from the other thread about this, sorry for the trouble. I had a similar issue before but slightly different. Seems like email system hiccups.

For a while I was getting multiple copies of receipts for each ride I took and they kept coming to me at intervals. Both support and my actual bank confirmed I wasn't getting repeat charged so it seemed to be an email system hiccup on Uber's end. The bank representative also said he personally had had other customers ask about the same issue and said he agreed it was probably a hiccup in Uber's emailing system.

This was this year, although I can't nail down an exact timeframe when it was occurring but it was late spring until early summer if I recall correctly.

I stopped having this issue more recently but seeing your post was a bit concerning, I hope this doesn't happen to me...