Deleting a tiu doesn't really change it's address. It just removes it from the remote and also anything associated with that tiu. Engines etc. Sort of like engines Id stick with then unless...not going there right now.
Only 2 ways to change a tiu's address,,, A factory reset or editing the address.. However you need to be able to communicate with it to do it.
Are you all fixed up? Yes the blinking led is a big help . Lets us know what we have to work with.
To place the tiu in super go to Menu/system/tiu set up/ super tiu/... select the tiu and hit SPR.
Your tiu are now tiu #1 and tiu #2 and working? Don't reset them. that will change the ID on TIU #2 back to tiu#1 . Don't reset the remote either. that will remove tiu #2.