Oh, and I have one to add that I thought of today.
In Tempus Fugitive, HG Wells tells L&C that he's going to drop them back before he ever showed up so that they'll remember nothing and "none of this will have ever happened."
But obviously it DID happen, because Tempus WAS sent to 1866 afterwards and wrote the diary. Plus, in Tempus Anyone?, HG Wells helped Lois remember the events of TF. PLUS, Lois wrote "Clark is Superman" on the envelope and THAT was still there when they were sent back. So yes, it really did happen.
So what'd HG Wells do, hit them both over the head and give them temporary amnesia before he dropped them back in 1995?
I don't get it.
