If this is the first Matilda level, I was confused by it too because I misunderstood her ability.
She gets the extra movement and action when she's picked up all three berries (when she shows the smiley), not for each berry she picks up.
It kinda feels like she's getting back movement and actions when she picks up things, but what's actually happening is that she's out of actions, so the turn ends automatically and her remaining movement is wasted.