Skeptiscm about error rate of the list? Why? Those purged are either felons or they aren't. It's not subjective. There are legal records - a definite legal paper trail. The person was a convicted felon or he or she is not. if they are, they shouldn't be on the list as per established Florida law.
Well there's a paper trail but unless these people are going to be informed, if a mistake is made it probably won't come out until somebody goes and tries to vote and finds out he can't. Secondly, it is easy to confuse people's identity if two people have the same name and that's what you are going by. If they do it by SSN, and inform the people purged so that they can challenge before the election, there probably won't be a problem. If they don't, there could be.