I used to have page numbers at the bottom of my document. I tried to add a file name to it. I ended up with this crap. I had to go through a 35 page document with someone over the phone using the same version of office. He has ACTUAL page numbers. I have spent 2 hours on the shit. And I have blank pages due to re-formatting.

Why has this automaticaly changed to
{ SAVEDATE \@ "dd MM yyyy HH:mm" \* MERGEFORMAT } { PAGE \* MERGEFORMAT }

I have never hit ALT+F( in my life

Adding a filename cannot produce a field that looks like
{SAVEDATE Y* MERGEFORMAT}
Neither can adding a SAVEDATE field. Adding a FILENAME field could give you a result like:
{FILENAME \* MERGEFORMAT}
Had you actually taken the trouble to accurately set out what the problem was, this could all have been resolved much earlier. For example, if in post # you had said you inserted a SAVEDATE field and it displayed as:
{SAVEDATE \* MERGEFORMAT}
we might have understood that it was a field code display issue, not a field switch issue.
Adding SAVEDATE, FILENAME and/or PAGE fields cannot of itself cause any reformatting, let alone blank pages.
You or someone else using your computer had either: pressed Alt-F9; or gone to File|Options|Advanced>Show Document content and checked the 'Show field codes instead of their values' option. Checking/unchecking that option does the same as pressing Alt-F9.

A little less intemperance on your part, mixed with a healthy dose of correct problem description would go a long way - as would taking a modicum of time to learn to use Word properly.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]