My FFDShow decoder settings keep changing back itself

[MKVCrazy]

I set

x264 to libavcodec
XviD to libavcodec
DivX 5 to libavcodec

but it keeps changing those 3 back to
x264 to ffmpeg
XviD to Xvid
DivX5 to Xivid

I am suspecting this is why I'm getting BePipe.exe error because when I had a perfectly working encoder, I had the 3 settings as the above one. Any idea what's causing FFDShow to bold enough and ignore my desires? :\