TS, I sounds like he wasn't that interested in you after meeting up and just went through the date. Perhaps he felt guilty and wanted to call you to explain, but then felt scared/worried that he didn't know how to say it. Forget him and move on.
I would suggest TS go with the local poly grad/hunky guy. And then intro the rich/kind/humourous guy to me, thanks! Seriously, where do you find these people?! Kind, humourous, well-educated, stable etc sounds like a catch to me
Thread starter, 3. I think you need to click the button/link on the top right that says resend verification email. Check email, click on verification link and it works! At least that was the way for me. You are actually not alone in that there are many many many people who feel the same way as you.
I think it's normal. I behave different with different people. It's group dynamics. Some people I feel more comfortable with, I'll make stupid jokes. And those you feel less comfortable or close with, you'd be more reserved. I noticed I can be quite quiet in a group but more lively when 1-on-1. As long as you are being natural and not contrived, it's fine.