Yeah, I've had problems with QO like that before. I wrote some letters using QO but when I loaded them up on another machine, the linespacing was doubled and the indentation for the addresses was bollixed.
To be honest though, I bought it mostly for the excel emulator which I use for a household budgeting tool and calculating the time to jumpgate for Fading Suns star ships :-)

I'm awaiting the unlock key for my upgraded copy.

IIRC QO converts docs to HTML and back again, which is where it has the capacity to go a bit Pete Tong on formatting.