Ive been posting for a while around the forums in other peoples topics and creating my own topics but my post number under my HA won't go up :/! Is there a certain way to do this?

Creating your own topic doesn't increase your post count (though making subsequent replies in your topic will), and also certain forums won't increase your post count at all. Off the top of my head, 'Welcomes and Introductions', and 'Morostide' (and any other event-related forums) won't, and also most user-run games forums won't, such as 'User Run Games' in Chit Chat and maybe the 'Avatar Contests and Games' forum in the HA forums as well.

ahh I understand now! Thank you :)!

You're welcome! C: