hmm thats weird..
when you make a new page.. do you open an exsisting page, (the page you made before that) and edit it? or do you get a blank Arty template document?
if not try using a blank page for every new page you make..
even though it shouldn't change if you would use a former made page and go from there..
I hope you can make some sence out of this
Don't you like Dreamweaver MX? thats what I use.. and it easier to use in my opinion and has more options..