if cora married henry when he was a prince making her a princess, how come she isnt a Queen and henry isnt a king oder of any royality in their later life before cora's the Queen of hearts?

May be they didn't become a King and a Queen because of a deal (for some reason) Cora made with Rumple, because in the episode "The Stable Boy" Cora sagte she made many sacrifices and deals to get them that life

Well I'm sure everything will be explained in season 3.

They actually DID explain why Cora wasn't Queen before Wonderland -- Henry had brothers that were older, and, therefore, were in line first.

Cora and Henry weren't in the first line to be King and Queen :)

I think maybe Eva, Snow's mom, has something to do with it. Remeber all the things she sagte to her grave (2x15). Also the deals she mention on 1x18.