The SIL cards are hit and miss with optical drives, and a lot depends on the driver and BIOS of the card. IOW, the same card might act differently with different BIOS or driver.
I wouldn't pay much attention to the displayed I/O mode, instead go by its actual performance. Is there an actual issue with your current card and the optical drive? By that I mean does it work as expected and produce normal speeds?
Windows usually shows such controllers as IDE channels and might just be reporting it wrong.