Problems i found till now:
1) Often, emunand doesn't boot. It hangs on a black screen. On standard 3ds, the 3d led should turn off while booting emunand, but when it hangs, 3d led stays on, so i think that emunand booting doesn't even begin... Solution: Force Power Off
2) Sometimes, emunand boot times are too long, about 30 seconds. Solution: wait. My suggestion is, on standard 3ds, to check if 3d led is on or off. If it's off, then it's loading emunand, else it just failed to boot and you have to power off your 3ds.
3) After opening Youtube application, it asked me to remove video viewing limitation from family filter, so it redirected me on Settings>Family Filter. After removing it, i came back to setting's homescreen and then tapped Close Settings. After that, it said SD Card removed. I skipped it by pressing A button and it went back to sysnand. After reloading GW exploit, i went into Emunand's settings and checked if family filter limitations were gone away they still be there. Had to remove it again, but that time there wasn't any SD Card removed error after exiting settings and this time, it saved new family filter settings. I don't know if you can reproduce that...