RatDVD --> DVD, File Too Big

When I try to convert RatDVD to DVD, for 2 of the files I have, the output is always too big. Even when I remove languages and subtitles to where it says the output will be 3.9GB, the output is still over 4.4GB and will not fit on my DVD+Rs. I’m currently running DVDShrink on it, but I would like a more efficient way to convert RatDVD to DVD. Is this a bug in the program?