They come out together on the same day. that makes it odd numbers.
1 came out first, odd.
2 and 3 comes out, this makes the last OVA that came out odd.
4 and 5 comes out, this makes the last OVA that came out odd.
6 and 7, last = odd
8 and 9, last = odd
now 10 and 11 will be coming out, this makes the last OVa that will be coming out, o.d.d.
Oh..... I was talking about the first OVA that came out in a set. So I was thinking that it was the even ones that came out first. Lol. Whatever..... It doesn't matter. We meant the same thing, only we both said it differently.