Jabird. Is that correct? I've never used Cryanair, but with squeezy you can make changes even after you have printed your boarding card. I know because my wife has done it a couple of times.
The LCC 'check-in' model isn't the same as check-in for network airlines. Once you've printed a LCC boarding card I don't think your status changes in their system. You can even go back and print your boarding card more than once. With network carriers, your status does change. To then make a booking change you need to be 'unloaded' first.
Perhaps Cryanair follows the network model, but I can't see why they would as their DCS is quite basic.