Oversized iPod conversion



I did a small change in iPod.h264 profile to max bitrate 1500 kbps and accept 640x360 and 640x480 resolution.
Then I do some conversions of ALIAS 4th season with 640x360 and 350 Mbytes file size with 2pass and 128kbps audio, but all files have 370 Mbytes (20 Mbytes more than I specified)
I did the same settings with other converter (Goldfish HD) and the file size is correct. There is something wrong in DVDFab Platinum

Obs.: The version is