  We performed a complete analysis of the spectrum of all the states in the
${\cal N}=2$ quark model harmonic oscillator band with $N_f=3$ in the large
$N_c$ limit including the often disregarded antisymmetric multiplet $[{\bf
20},1^+]$. We included configuration mixing effects. We found that the states
in the $[{\bf 56},L^+]$ and $[{\bf 70},L^+]$ with $L=0,2$ fall into nine towers
of degenerate states. We found that nonstrange antisymmetric states fall into
three towers and respond to the same structure as the states in the $[{\bf
70},1^-]$ multiplet. We also showed explicitly the compatibility of these
results and the scattering resonance picture.
