, You can. But if you want to make things easier, keep a copy of everything, anything that your spouse needs for the cancellation of his extension, just in case. Such as the termination letter, cancellation receipt of work permit, cancellation stamp on his passport, etc. His cancellation stamp might be sufficient, but it's not a bad idea to keep copies for your turn.
Q. I think it was helpful that the re-entry permit had been issued by CW,
-> Yes, CW wouldn't move a re-entry permit if it's issued at the airport. In that case, you need to go to the airport that issued a re-entry permit to move.