As a commissioner you should be able to add someone back in if you remove them in error.
Because yahoo assigns suggested Pick Set names I had multiple people with "My Groovy Pick set" and I went to remove someone. When you go to the removal screen it only shows the names of the pick sets and not the emails associated with it. I wouldn't have made that error had the emails been next to the name and/or if the member name would be next to the pick set name. Either way as commissioners we need to have more tools at our disposal in case we make an error or someone else does. This pool is too final and doesn't have enough versatility.