After our first game using Infirmary B we had a few questions, hoping some of the experts can help out
1) Is it correct that when a mage is wounded they go to the Infirmary, collect a consolation prize, and THEN bounce to one of the unclaimed errand slots?
nope, if they choose one of the unclaimed errand slots, that replaces the normal consolation prize. they can of course choose not to take a slot in order to take 1 IP
2) Can a player place in the unclaimed errand slots on Infirmary B voluntarily (without the mage being wounded?)
nope you can only go there after being wounded
3) Are mages on the infirmary errand slots still considered to be wounded? If so does that mean that they can later be healed and moved to other rooms in the same round?
they are considered wounded, they can be healed from those spots.
4) Can a sorcerer wound and replace a mage on an infirmary errand slot?
since you cannot place a mage to those infirmary spots normally, no you cannot use a red mage to bump someone off of those spots. the only way I can see would be to heal your opponents mage off of that spot, then when one of your mages gets wounded you could take the unclaimed spot. might be counter productive though.