Phoebe is tossing French phrases about when she receives Mata Hari's karma, but when Jason is about to be killed she says "Goodbye, mi amor," which is Spanish. The correct phrase should be "Goodbye, mon amour".
As Piper is vanquishing the Swarm Demons with her exploding power, you can see a gash on her forehead. Then Phoebe and Paige orb in and take her back home. As they orb in, the gash on her forehead is gone. But Leo comes over and heals the gash later.
In the season 1 episode "Is There a Woogy in the House?", Piper and Prue illustrate on a map that the location of the manor is at the corner of Turk St. and Laguna St. in the Fillmore district of San Francisco. In this episode, the manor is shown in Presidio Heights, a location far northwest of where the manor was located in season 1.