Migrating to some newer code and forgot to add in tag count in index listing. Tag counts won't be fixed anytime soon, as I need to fix the underlying bug causing them to go out of sync so easily. I can restore the old autocomplete, but it looks a little tacky, and I haven't yet been able to review the CSS to make it fit the theme a bit more. I'm not sure how important tag counts are in the autocomplete either, as it lists the results by tag count, descending order.
I've increased the page depth you can go for the post listing as it's not currently an issue.