At L10 Tempest, you get STWF
Manual:
"10: Supreme Two-Weapon Fighting - Tempest gains another two attacks per round in her off hand but at a -4 penalty to her attack bonus."
However, this reads that STWF has 4 primary and 5 secondary (1 TWF, 2 Imp-TWF, 3 Gr. TWF, 4, 5 STWF).
Should the Manual read ".. another attack ..?" Does the code really give more off-hand attacks than primary?
Also, is the monk UBAB / monk attack schedule disabled for PRC TWF?