Currently in the Round 1074 standings it appears as though I made three successful hacks:

However I have submitted only two unique successful hacks. One of my three hacks was a duplicate, with the same input against the same person:

Why is the duplicate counted in the standings? If Round 1074 was a Div. 2 Round and hacks were rated, would the duplicate count towards my total score? If not, why allow duplicates? They make the scoreboard count meaningless, as anyone who can get one hack can get 10.

I want to ask because there is little information on hacks in the contest rules: