UNDERSTANDING MALAYSIAN CHESS RATINGS!?

When the new NR were released on 14 January 2013, hAnA lost 62points whilst The cHEss pIRATE gained 32points, both from 5 events. The details, HERE

What is interesting though is that both lost substantial points in the 3 or 2 FIDE-rated tournaments which they'd participated. Combined, hAnA lost 94.1 points whilst The cHEss pIRATE lost 88 points after participating in the 4th Penang Open-Challenger and 5th NJCC. The points were dropped despite both of them playing true to ratings I.e. They'd defeated lower rated players and lost to higher rated. In hAnA's case, she'd drawn against a higher rated player in in 1 event(Nf6 Juniors) and still lost 28.421points in that event. The cHEss pIRATE had played true to ratings and had defeated 1 higher rated players in each of the 2 events and still lost 40(4th Penang Open-Challenger) and 48(5th NJCC) points respectively.

Now I would understand if points were dropped if one were to lose or even draw against a lower rated player but dropping points when one plays true to ratings is a bit difficult for me to comprehend.

I guess I need to figure out how the Malaysian chess ratings are calculated.