it aired on tv in the same sequence too for some reason.theres a past post in here discussing/explaining why and what hasbro has done to fix it.i just dont know where or how to link to it.i think it went so far as hasbro replacing a disk or something.
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I have the Box collection of Transformers Cybertron and I have found that "Inferno" is at number two right after fallen and before "Haven" so to answer you question I have no idea and to answer your other question I wept as Vector Prime was destroyed and I still feel for the gentleman but as I have found out[in my own version] he did it to save the Autobots and the children so that they can get back through the warp gate
The first 2 episodes of Galaxy Force (Japanese version of Cybertron.) were edited in to 1 episode; Fallen, Inferno was the unedited version of episode 2. Because there are a few different voice actors in Inferno I think it was a demo episode or something like that, and was never really meant to be aired.