So basically I want any post based ranks, and special ranks to appear alongside each other by a players avatar. Problem is when I assign a player a special rank, that appears, but the rank they will have that is dependant on how many posts they have made will no longer appear. There is no apparent way around this as far as I can see. Can someone lend me a hand with this? Thanks.

Please read that.
https://help.forumotion.com/t116240-multiple-ranks-for-one-user#760817

Alright, how do I make this exclusive only to those who I give it to?

The profile field as a special rank, you can have a default as a blank image.

I also do not know how to make it show up under a persons avatar when they make posts in the forums. I ticked both profile and messages.

Did you hit replace the content?

I did not. And I did not understand what you meant by "The profile field as a special rank, you can have a default as a blank image."

Nevermind, I have figured it out. Thanks for your help! +1