I wonder if these undeletions are just the Content Delivery Networks (CDNs) taking time to sync up?
So you login to one Reddit instance and delete/modify all your posts. This will take time to trickle down to all the other servers in the network. When you next login you are logging into a different reddit instance that has not yet synced up all the changes you made.
For example where I am there are four reddit servers when I check the DNS for reddit.com
;; ANSWER SECTION:
reddit.com. 92 IN A 151.101.129.140
reddit.com. 92 IN A 151.101.1.140
reddit.com. 92 IN A 151.101.65.140
reddit.com. 92 IN A 151.101.193.140
Just a theory that might explain what people are seeing. That said with the behaviour of reddit admins over the last few weeks I wouldn't put it past them to be undeleting though.
I was watching a review of the GOP debates by some US political junkies just last week and one of the hosts said that Vivek knows he doesn't have a chance but is using this presidential run to get exposure for his planned foray into right wing talk show host. Something like Tucker or Alex Jones.
Great bang for your buck with free news media advertising by pretending to run for president and saying crazy stuff.
After hearing he wanted to start his own right wing talk show his character and mannerisms made so much more sense.
Apologies for the facebook link (They start talking about him around the 14 min mark and the comment on his talk show plans is at 20 mins)
https://www.facebook.com/abcplanetamerica/videos/3482537835297757