If I understand what you are saying, that is normal behaviour for word.
It gives it that title so in case something happens while you are working on it and before you give it a name you wont lose you data.
Word does mini saves every so often to help keep data loss from occuring and in order for you to be able to find it there has to be a name associated with it.
Basically this is the new document that you want.
To give it a name that you want use the save command and give it whatever name you want.
Think of it as a draft document until you decide to give it a name.
If you like certain adjutments such as different default fonts, spacing, etc.
Make them while document 1 is the title and then hit file|exit.
Next time you start word with a blank document (document 1) it will have all of those changes already in place.
This is very helpful if you create the same types of documents often.