I Have a Suggestion for Similar Worlds

I just had a birthday on Tuesday and this would have bumped me from one age bracket into another. I've noticed that this hasnt happened and I'm wondering if it's supposed to be automatic or if I have to do this myself. If I'm doing this on my own, what's the point of entering our birthday into the system?

My suggestion would be to make the birthday a fixed date that's entered when an account is created and then auto-select the age group based on that. When that date comes around, have the system check the age groups and then update it as necessary.

As for me going from 17 to 18, do I need to make a new account for me being "an adult" or will my old account let me do this? Will everyone that's been blocked to me suddenly be available to talk to or will they all still be blurred out?