ReaTrak has both:
Code:
  if notenums == "0,4,7,14"          then chordtype = "add9"    match_chord = 1 end
  if notenums == "0,3,7,14"          then chordtype = "madd9"   match_chord = 1 end


Cadd9


Biab changes it to

Cadd2


Code:
if notenums == "0,2,4,7"           then chordtype = "add2"    match_chord = 1 end