Since the veterancy system changes they implemented back when people raised a stink about stacking, veterancy will only apply to the hardpoint targeted rather than to all weapons on the unit. As such, if you want to improve alternate attacks or secondary weapons, you'll have to have the bonuses repeated for every hardpoint you wish them to apply to.
As always, thx for the answer. So having the scatter bonus mentioned 2 times and the range increase affect AA is just a big oversight on Relic right ?