SMS 60fps speeding game up immensely.

[JosJuice]

You're not doing anything wrong - it's impossible to make the SMS 60 fps patch work without introducing hacks in Dolphin itself. I think Ishiiruka has such a hack, so give it a try if you want to play SMS in 60 fps despite it not being a "clean" patch: https://forums.dolphin-emu.org/Thread-unofficial-ishiiruka-dolphin-custom-version