OBS again

[Chess Ref]

ASA 16U elimination game. I am PU. Runner on 2B. Shot to Rf -the throw home is up the 3rd base line. catcher goes up the line forcing runner to go around her. The catcher makes the catch , turns around and beats the runner to the plate and tags her out. I rule OBS.. ANd the fun began.
I heard everything from the catchers "rights" all the way to my misinterpertation to the sky is green as the reason I got that call wrong.
IMO the catcher impeded the progress of the runner. Please tell me I got this right, if not please tell me what i did wrong.
Thanks for the feedback...