Electrostatic charge changes crystal frequency
22 pF sounds really high for a small 33 kHz watch crystal.  This excessive capacitance is probably causing the PIC and crystal to oscillate at some sub-harmonic.  But the loop gain is low and the oscillator is unstable.  A little jolt when you touch it causes it to jump to the intended frequency.

This is a good example of the trouble one gets into when building a circuit without having read the datasheets.  Go read the crystal datasheet and see what a appropriate load capacitance is.