Entering the ISBN 13 code in manual book entries

Hi, I manually added a book and entered the ISBN 13 in the following format (including the dashes): 978-85-254-1059-7

The entry was created ok, but the ISBN shows incorrectly as an ISBN 10. Check it out: www.listal.com/book/a-arte-da-guerra-sun-tzu

I tried editing this entry to correct the ISBN entry, but the ISBN field is not editable.

Is there any way to correct this and how should I enter the ISBN 13 code when creating a manual entry? I suppose I need to enter just number, but I would like confirmation.

Thanks.

edit: I tried adding another entry inputting only numbers for the ISBN-13. It shows all numbers but labels it as ISBN-10. See here: www.listal.com/book/notas-de-um-velho-safado-charles-bukowski

Sory for the delay but I've now added an extra field to enter isbn13's and corrected the 2 books mentioned.

Thanks. I'll try the new isbn functionality.