I think the problem is witht he fact that they cannot prove it was a new ingestion, and have already gone with the pulsing excuse for the picograms showing up.
They said multiple times it would show up in random testing at times, so i am not sure why everybody is acting like this is something nobody expected to happen.
Do I believe them? Meh, as long as the test results keep confirming what their resoning is, then they are still in the parameters of what they said they were. Now if JBJ had popped with like 200 picograms then things might be sketchy for them, but as long as his tests keep coming back within that range UFC and USADA will no doubt follow the line they have been pulling about it.
As long as they cannot prove a new ingestion, JBJ was already punished for the PED being in his system, so therefore they really have no action until something tips the scales.
Edit: BTW I hate JBJ as well, I just see why and where they are coming from. They went with this reasoning, and won't backtrack while he is still testing the way they expected him to test.