What's the difference between +1 summon limit to skeles, and +1 summon to skeles?

This is by me: Sanguine Lupus - Pet Conjurer

TheUberElite has one: [1.1.1.2] Physical/Bleed Pet Conjurer (15:30 Callagadra)

Then there is my Bleed version of Moggy Puppy: Pet Conjurer - Moggy the Puppy! (but not sure of it counts)

Btw, is it just me or are imgur gif links broken on the forums?