I created a character tag (chris_benoit) and when I type my tag into the search box, it doesn’t appear on there with the (#) next to it. There has only been 1 post with that tag and it’s new on the tag list.

Do I need to make a second post to make the tag be seen on the search box?

Only tags with at least 3 instances will show up in the autocomplete. Tags with less than 3 are still searchable, though.

ah ok, still wish it would show up though

I'm guessing the lower numbered ones don't show up to prevent the list from being flooded with one-off typos. Personally, I reckon the minimum should be 10 rather than 3.