Some detection times are not accurate. For example, injected Stanozolol can be detected for up to 6 months after injection.
As for half lives, most of them are completely wrong. Just to bring a few as example...decanoate is 6-7 days, enanthate is 5-6 days, phenylprop is 4.5 days.
One guy wrote wrong info on AE, and others keep reposting it. Of course, it's not crucially important, don't get me wrong...still, some might find the right info useful.