Gpg: BAD signature from "Qubes OS Release 4 Signing Key" [full]

Answer me this… why are there three dates?

Imagine if Qubes is just NSA all the way? Now i suddenly don’t trust Qubes as much… I need an explanation… What’s up with the dates, and why can’t we know more about the masterkey and sign that one?
Openbsd seems more secure… Or if i’m just confused, you are the experts… What’s up with the dates? I need to learn PGP… One date seems the most logical to me anyways. One key and one date.