block.io wallet who has one? I have a question on this one..

[Gecko8]

I have set-up this wallet in my early days with cryptocurrencies. Now here my question: I have my seed, but it has only 11 words. Does anyone know, whether this is correct with 11 words? I thought seeds are normally with 12 words. I did not find any information on their webside. Now I would like to use the wallet but scared, that I might have not my private key really. So before I do all over again, can someone tell me, whether my seed with 11 words is complete for block.io? Thanks