The prio tells CCcam which card idents to ignore, and which to give priority too it personal to your system and what you are capable of opening and not opening. It helps to open channels quicker.
The channel.info will let you see the channel name its opening and not the caid.
To be honest your wasting your time learning anything regarding CCcam its no longer supported and your time would be much better spent learning how to use Oscam.