Corrected entry: Throughout the series, over military and other official communications lines, people say "repeat" when they repeat something they've said. The correct phrase should be "I say again." "Repeat" is an instruction to fire/shoot again. Since the writers were careful to get other aspects of military life aboard a carrier right, this particular mistake is quite obvious.
Corrected entry: Throughout the show the humans refer to the Cylons as a "race". They should be referring to them as a species. Among the humans there are different races present and it would be more correct to refer the Cylons as different species in that they are as different from humans generally as humans are from rats, for example.