the true reasons are I discovered the error after the first prize giving of plaque (red wording) to 一刀n断 (one photo taking) and before the prize giving to Bishan members, i.e. the cash prize given to him at this point (another photo taking).
this 八卦 news is for 卷心菜, on 一刀n断 too.
一刀n断 played with 邱子扬 in Round 8 and won. I think he should share the $20 (two $10) NTUC FairPrice Vouchers with 邱子扬. :D