So, if Halloween plays smoothly (apart slow navigation, that I could confirm I encountered in x264 encoded material), then EasyBD Lite works well, and the problem lies in MultiAVCHD...
You can find MultiAVCHD project file inside the EFNY folder \BDMV\AUXDATA\multiAVCHD.mpf - could you please take a look and see if I forgot something, or made wrong settings? Many thanks in advance!