>If two bands, the filters are in parallel - a notch filter

configuration;

> and if one band, they're in series - a bandpass configuration.

that makes sense..ok, it sounds like one band. looking at a fft
display, looks like one band. the bell gets wide and narrow and
moves up and down the freq scale but never splits except when
there is high res on both HP and LP, and here the res of each
overpowers the osc to the point of no longer behaving like a filter
but more like a pair of sine wave generators. i wouldn't call that
a notch filter. thanks all..
-duff