Yeah,
Sorry about that - something got screwed up in the code for SS registration this year.
We've just completed Round 5 at HPR, and are now moving to round 6 at HPR.
I just checked out the link and you should be able to sign up for Round 6 (HPR) in the supplied link:
https://www.mra-racing.org/secure/superstreet/
I've edited the first post to better reflect the schedule.
Thanks!
Looking forward to seeing you out there!
Scott