Obviously, it is confusing for some users during registration to fill "name" and "surname" fields and they end up with filling full name into "name" field (e.g. Marek Suchánek) and then again surname into "surname" field (e.g. Suchánek). It would be better to rename it to "first name" and "last name".
Then it might be also question what to do with middle names if person has any... (probably put all into "first name" field, but will that be clear?)