Your taking one factor (i bought a package on WF) and suggesting that is the reason for your drop, when in fact there are hundreds of other factors at play, most of which you do not know about or can comprehend.
It's just not logical to make assumptions like that. It is ignorant at best and borderline retarded to think otherwise.
You are correlating separate incidents and suggesting that they are in fact related. When you have no real proof other than the fact that you "think so" and some other guy on a Internet forum said he did something too.
This is your thought process:
"One week in college I ate nothing but pizza for an entire week and I lost weight. Therefore, pizza makes you lose weight."