that primers pretty good, 1k means one component, no activator or hardener, bout all you can get in an aerosol. in the shop we use 2k products, those are activated/use a hardener... a 2k will always be better than a 1k but 2k won't work in an aerosol cause once it's mixed it only has a usable lifespan measured in hours...
micro pinholes or surface imperfections could be causing your gloss issue, either that or the patch is soaking in the primer different than the rest, but doubt that is your case really unless your mix of repair compound was way off...