Leo says the ringing in Paige's ears means that she has a new charge as a whitelighter. This is impossible, since in all other instances the elders assign charges, and the elders think the charmed ones are dead.
After the woman's purse is stolen, when Paige finds it on the ground, she asks herself why she didn't orb. She was in public with many people around, she couldn't orb without exposing magic.