its the narrative, they dont want Peyton to be guilty so they just refuse to acknowledge the information. People tend to do it a lot with PED's, Ortiz, Pettitte, Mathis all dont get labeled as cheaters depite failing drug tests.
It's all about branding. The Mannings are a "wholesome NFL family entertainment brand." The only branding Chandler Jones will get is by iron or prod, figuratively speaking.