Scaling in older instances is broken

[Thrandomir-malfurion]

This got a reply at breakneck speed yet crickets over here. Breakneck for Blizzard anyway.

Pet XP required to level increased?

Pre-10.0, it took 12 of the normal Battle Training Stones to get a pet from brand new level 1 to 25. Now it takes 15 stones. Is this intended?