Video I have unusual whoopee cap with Halloween: Chromatic Corruption paint still in tact

[CounterCraft]

Halloween paints were suppose to be expired after 11/09/2012, but I have unusual whoopee cap with paint still in tact, ss this bug/glitch or normal?
http://www.tf2items.com/item/1274184035

 

[KewnTunes]

The paint lasts 2 weeks after you paint it. It will go away soon.