If you resubmit a different URL we can't very well label you a spammer for repeatedly resubmitting any URL.
Experience has it that people who worry about spammy submittals are never spammers; people who worry about submittal of spammy sites always are.
It has to be pretty nasty spam to invoke penalties -- you have to submit multiple spam sites, or shotgun-submit a site repeatedly, or submit multiple related sites, or threaten to sue someone, ... all vicious stuff that nobody could do by accident. Misspelling a URL, _I_ could do by accident.