Housebreaking a male Border Collie!!!!!! Update pg 6.

Sounds like he is willing to go outside since he understands your correction about going inside. I wonder if he is giving sublte cues that he wants to go out that you are not seeing them. These cues can be very subtle (and vary with each pup) and unless you are watching him 100% of the time (hard to do) you may miss them.