Here's another bug. Try modulating OSC 1's frequency by either OSC 2 or OSC 3 ramp output. When the modulator's shape is ramp up, the Osc 1 frequency actually ramps down (you can easily hear this for low modulator frequencies), and similarly a ramp down shape causes the Osc1 frequency to ramp up. The ramp outputs from the OSC2 and 3 ramp outputs are as depicted on the knob legend (Ive checked with a virtual oscilloscope) so somehow this signal seems to be inverted before modulating something else.