I'm planning to submit a short story to a magazine which requires e-mailed files to be sent as .rtf

My problem is that when I save my document with this file name, the formatting gets all messed up--my title remains centred, but my byline shifts to the left; half of the paragraphs retain their double-spacing, while random paragraphs throughout are reduced to single-spacing. That kind of thing.

I know I've had this issue before, years ago, and I'm pretty sure I even asked this question at the water cooler at that time and received a helpful answer...but I can't for the life of me remember or find that old, old thread Can anyone help me out? If it helps, the program I'm using is OpenOffice.