Why are people treated differently

#	User	Rating
1	tourist	4009
2	jiangly	3823
3	Benq	3738
4	Radewoosh	3633
5	jqdai0815	3620
6	orzdevinwang	3529
7	ecnerwala	3446
8	Um_nik	3396
9	ksun48	3390
10	gamegame	3386

#	User	Contrib.
1	cry	167
2	Um_nik	163
3	maomao90	162
3	atcoder_official	162
5	adamant	159
6	-is-this-fft-	158
7	awoo	157
8	TheScrasse	154
9	Dominater069	153
9	nor	153

Yesterday I had an okay round 427. I solved 4 problems and... got kicked out. Presumably I leaked my solution on ideone and someone copied and paste my solution.

I know I am partly responsible for this cheating event because I "published" the solution during the contest. I will take this lesson seriously. However, what makes me unnerving is that delete4 still preserves his competition results of round 427 and had a decent rise in rating.

I am deeply frustrated and confused by codeforces' decision. Why did delete4 get a different treatment from me if we are both caught "cheating"? Is it merely a small mistake? Or someone is convinced that I am the only one who is responsible? Or there are other terrible things going on? I hope the people who is in charge can give an honest response. KAN MikeMirzayanov qoo2p5