How can I stop all my files making backups of themselves?

I've tried searching online for this problem and it seems like I'm the only person who has it (or my search technique is rubbish).

Every time I print off a copy of an existing pages file the computer makes a backup copy of the file - but it's saved in the same folder as the original file so there seems little purpose.

Unchecked I've been know to find a file labelled something like 'back up of back up of back up of back up of back up of letter to customer' or whatever. It's quite irritating.

I don't have a time machine device and I'm mainly saving to dropbox if that makes any difference.

Anyone know what the devil's going on?

I'm on OS X Lion 10.7.4

 

Am I on my own with this one?