How are you viewing the logo? In Internet Explorer or another web browser?
I've found that when I export to SWF using RAVE, if I just view the SWF itself without putting into a web page (table, CSS, etc.) that it is never the correct size in appearance on the screen.
Try creating a table with a TD that is the dimensions of your GIF and place the GIF in the TD. Then view the page and see if the animation is correct.
The end result used outside of a web page should display properly; but if you are just opening it in a browser or viewer, it's not going to display at the correct size.
My SWF files do the same thing when I open them by themselves in a browser; but when I format them in a HTML document, they display in the correct size.
It's not really a bug; most browsers have a default size display for items, so if you don't delineate it in a HTML doc, that's the size you see. Your GIF is actually probably the correct size. If you are using it in a program, this shouldn't be an issue at all.
Unfortunately, Corel abandoned R.A.V.E. after version 3.