England is listed as Vereinigtes Koenigreich (sorry I don't have Umlaute at my work computer) and two street boxes? I might have to have a look at that. A small and big one? One might be for the house number and one for the street name. That's all I can think of right now.
I think that its in case your house has a name as well as a number and street. You don't have to fill them both in. Or in case you live in an apartment/flat so you can put in the name of the block in line 1 and the street/address in line 2
<3Für immer sexii, für immer adorable und für immer Bill Kaulitz<3
XxIch leibe dich für immer und immer, BillxX Ich liebe dich und vermisse dich bis an die Grenze, und ich bin nicht aufhören ... Bill Kaulitz