I don't believe secret locations or seam streets count towards completist. It's pretty common that when someone thinks they have visited all the streets, they've actually missed one. This can be hard to notice on a quick glance at the map. Take another close look at the map and see if there isn't actually a street that you've missed. If not ask in live help when a staff is on (daytime US time) or file a bug report.
Turn in a ticket. I am currently having the same issues with Jethimadh. After talking to them, they forwarded it to a bug person and I'm waiting that out. In the very least they'll be able to tell you how many streets the systems say you're missing, and possibly which ones. If they really can't help, they'll find someone who can. I wish you the best of luck in your badge though!
I yield to Brib Annie's superior knowledge on seam streets. I never paid attention to them when getting the completist badges. Apparently I was just lucky in having visited them by the time I needed them!
Looking at the Kajuu map, I'd say it would be really easy to have not visited Akki Blocks and not notice that fact when looking at the map. Just a thought.
I'm not sure if the badges are based on filling that out, but it ticks off all the streets you've visited so might be useful for spotting one you've missed.
Back in my day we had to walk to all the streets for our badges, none of this "encyclopedia" or "dotted line" nonsense! We had to wait for out keys for the seam streets, we had to figure out unnnn all by ourselves. Kids these days, so spoiled.
I agree Papa, far too easy for these next-gen glitchen! I think that while the encyclopedia list is really handy, it was much funner when it needed to be figured out
There are only 8 streets in the actual Seam Streets hub and those weren't needed when I got my completist achievements. Martleby Hare is listed in the Groddle Heights hub and thus is technically not a Seam Street.