Did you mark them as zeroes in the SOD? The write up in the OP I've been following says 1-10, but it's nice to know the precedent.
1-10 is the rule, has been forevs.
People have given scores with negatives, but I've always counted those as 1s, but in a total defiance of logic if they scored a book between 0 and 1 I entered it as that score. I think most likely I did it that way just because the slack asses that preceded me didn't clearly state 1-10 as a rule in the OP. After I included it in the OP I continued to allow 0-1 scores because disallowing them would in my mind mean that I would need to go back and disallow the previous 0-1 scores and that sounded like a pain in the ass.
So basically in less words, 1-10 is the strongly encouraged rule that can be broken on the dl. We're talking about it impacting the overall score by tenths of a point anyway so whateves.
On the flipside, people have obviously given scores over 10, but those have always been entered as 10s.