> Is it bad protocol to go back and cleanup questions and answers to make them a higher quality

No, that's actually a good thing.


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The point of a continuously edited questions and answers site is that the people seeking the information can find it right away, without having to jump through hoops and pages long discussions. Consolidating and cleaning will help not only others who are seeking the same, it will help you in the future. 
(Yes I'm speaking from personal experience).