MRJ was not made a regular until S3.
Colin was made a regular in S2 (the second half) and there have been no changes. When the UPfronts happened for ABC they released the cast list and the only one missing was Meghan Ory who is moving to CBS, Colin was still on there. There is no need to confirm Colin because he was already a cast member and will continue to be so.
And yes, the OUAT band was clearly a joke.
[adrotate group="5"]
"He was a lot of things to me" "The only conclusion was love"