the double knot effect is a firmware bug they introduced also to the rm970 on version 2.20, i am noy sure if it was fixed in 2.23 though i have not had a look but i think it did get fixed, i take it you upgraded to the latest firmware also
did you use the BMP0 method of modding??
also look here, its a dedicated BBS for Ramos players
Translated version of http://www.ramos.net.cn/
lots of theming etc goes on here and good site