I was referring to this part:
paizo:
If you cast antimagic field in an area occupied by a summoned creature that has spell resistance, you must make a caster level check (1d20 + caster level) against the creature's spell resistance to make it wink out.
I think this should apply if the caster of the antimagic field moves the field into an area occupied by a summoned creature with SR. I don’t think it matters whether you cast I straight on their face, or cast it first and then move to them.
But you think it shouldn’t. Fair enough, you’re the ref.