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synthesizer problems


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hello everybody. so i am building a synth using a bunch of 555 astable circuits with an octave up feature that works like this: i use  a cd4066 quad bilateral switch to connect a second timing resistor of the same value as the one in the astable circuit when the control pin is at logic 1. i tried te circuit without the timing resistor and it worked fine, but then i tried it with the 4066 and the second resistor, and for some reason, even when the second resistor isnt connected in parallel, it effects the astable circuit.  i think there may be some leakage, or just something i dont know about the 4066, but i could really use some help. thanks, i appreciate it.

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