This flag was (typically) 100% valid at the time it was cast.
Regardless of whether the post was later edited and fixed, it still had problems on submission that took effort from the community to fix.
Therefore there is no need to do anything. Correct, helpful flag as cast.
(Usually when I see a flag and think "hmm, don't see any issue here", there is an edit history and that explains why. This is another reason I tell mods to try to err on the side of dismissing mod flags as helpful, by the way. Nobody is sitting there flagging posts because they're bored and have nothing better to do, or at least, I have pretty much never seen that in my entire 13-14k flag handling history.)
Also -- attracting flags, regardless of whether they are marked helpful or dismissed have, uh ... shall we say.. a "certain effect" on new users.