Wait... How does this relate to using the computers to communicate with the other stations? Isn't that what the Swan Station Orientation Video stressed so much NOT to do as to avoid another incident?!? How is the incident related to that?
That is exactly what the video said.
Maybe they somehow comunicate through the computers to coordinate the actions which cause the incident. Doesn't sound that good but I can't think of something better

That's my theory as well. Something having to do with whatever is happening at the Orchid, and what is happening at the Swan.
Chang referred to him as "a scientist from Ann Arbor". He didn't say "one of our scientists". Seems to me that he didn't know Daniel from before.
he did say the sub was bringing in a scientist from Ann Arbor, but so far we can't be absolutely positive Daniel was the one he was referring to, the writers could be playing around and leading us down a false path
the scientist from Ann arbor could have been the main passenger on the sub and they just never showed him, while Daniel is a recruit and just happened to hitch a ride on the same sub
we do know Daniel was there in the past, but maybe the cover story he used 3 years ago was "I'm a scientist from Ann Arbor and I'm a member of Le Fluer's expedition", but while "Le Fluer" and Juliette and Miles stayed on he island, Daniel took the sub and went back to Oxford or Ann Arbor
but if that's the case, and his cover is a scientist and that's who they believe he is, then why is he wearing common work clothes and doing construction in the series opener ?
Actually, he said that the sub was bringing in scientists from Ann Arbor, transcript from Lostpedia...
DR. CHANG: Sub's here from H.Q. I need your help bringing them in.
MILES: Sure. New recruits?
DR. CHANG: No, uh, scientists from Ann Arbor. Get your van, and let's get to the dock
When I watched it, I heard scientists as well, so obviously Dan was who he was referring to.