to clarify, if a disqualified quest can be fixed by the participant before the submission deadline, it can be resubmitted.
If a quest is resubmitted before the deadline but isn't fixed, other actions are taken (as it is implied the creator is disregarding the rule).
The onus of ensuring a quest qualifies is on the submitter, not the judge. Disqualification after the submission deadline is unfortunately the result of a submitter not ensuring that they are following the rules as posted -- these are written for a reason --and ultimately that is the only fair consequence; to your point however, if a quest is disqualified in error (as has happened in the past), it can be resubmitted exactly as it was. This is facilitated by an invite from the host.
It is very important for participants to read and understand every rule in the event!