JiveTalk does not spit out Spam messages! lol. JiveTalk doesn't even send data, it IS the IM client (Yahoo, GTalk, Aim, etc.) that sends the data.
Mthr1, I don't think it is the RIM network. You are the only one I know of having this issue with the delayed PIN and BBM messages. And the fact that you get it ONLY between two specific PINs, helps me believe it is something on one or both of those devices.