Dear Mark Olson,
Thanks, those are great questions. In geometric algebra the 'trivector' or volume form has both geometric and algebraic properties (as do all GA elements). In particular, it has volume and orientation (handedness) but it does NOT have a fixed shape. It's volume is normalized to unity.
I actually spent a good while trying to figure out how much of the circulation was in the 'bow' or leading wave and how much was trailing wave, and finally decided that it's the volume that is 'fixed', proportional to Planck's quantum of action, h. This follows from combining de Broglie's wavelength relation with the general relativity equation. The volume is the 'cylinder' defined by the circulation cross section times the length of one wavelength.
But whether it is actually a 'cylinder' (doubtful) or a 'teardrop' (perhaps) or something else, I don't know. I suspect it depends on velocity and probably local environmental factors. I find it useful to think of a vortex in terms of a tornado, whose shape changes but the entity endures. [Google 'tornado videos' for amazing examples.]
So I view the lengthening wave as continuous, but if it forms a closed orbit it must (for reasons of self-interference if nothing else) consist of an integral number of 'volumes' where each volume represents a quantum of action. The wavelength may vary slightly around the orbit as shown in on page 5. The relevant equation is (9).
Edwin Eugene Klingman