Oh, no, I more mean something like this. So, let's say Voyager turns on its temporal shields in "Year of Hell". Gets in a firefight with a ship. Then Annorax makes some change so that ship never existed. Because of Voyager's shields, its timeline is still the same, its past is still the same. They remember fighting that ship, and their records say they had a firefight with that ship. And since we know Voyager having temporal shields screwed up Annorax's calculations, that must mean that Voyager's past after they turned on their shields must have been the same too. So what did the rest of the universe see in that timeline when Voyager was having that firefight? I'm choosing to imagine they saw Voyager flying around wildly and firing at nothing at all.