When the quiz is resubmitted, it goes back to the bottom of the queue.
If the editors have time, sometimes they will go through and see what ones they have already seen and then re-edit those. (There is generally a better chance of this if the previous time the quiz was rejected the errors were specified out and the author doesn't have a history of making 'additional changes' from what the editor specified needed to be changed in the quiz. This is because the editor will just need to run down the list of what they looked out last time.) However, please note that this is an 'if they have time' and is by no means a requirement of the editor. Frequently, editors are working on many quizzes at once, so each time they have to look at the quizzes with fresh eyes as they may not remember the quiz from before.
~LadyM, FT editor
"Without the darkness, how would we see the light?" ~ Tuvok
Editor for Television Category