I think you should call it whatever you want to call it. Who cares what RUSA says, UMCA says, random people on the interwebz you've met say? It's a great accomplishment, and my hat is off to anyone who wants to spend their summer sundays riding 100 miles roud trip & volunteering at a bike program. If you want to play by someone else's rules then that is fine. But if you're cycling for the enjoyment, who cares?!
Where I live, people don't think I am a serious long distance cyclist b/c I have never completed LOTOJA. To each their own (that double century costs $175!, plus you have to enter a drawing). Don't ever loose track of why you are cycling, however it is you define it.
BTW, I get nasty hot foot in the summers, so I have taken my helmet and shoes off during a 200k. GASP!!