I spent a good couple of hours debugging publishing to relays today.
Eventually I ran my own test relay so I could better see why things were not working.
I was able to publish my old events to my personal relay, but for the most part I was not able to publish my old events to the relays I attempted to do this.
I am guessing that there is some kind of filter preventing old notes to be re-published on new relays?
Let me know if you have any ideas or if you want to chat about this!