I know what you mean, there are alot of sectors in Geneva.. well first off, if you are coming from MILAN, here are the possible sectors
ground-FL 260
FL 270-310
FL 330-350
FL 370 +
When you get to MOLUS you have basically the same thing, the "MOLUS sectors" cross all the even altitude traffic over MOLUS and the "MILPA" sectors cross all the uneven altitude traffic over MILPA. Very good system actually.
You are coming from MILAN, climbing to FL240 or 260.. the first sector talks to you, gives you a new code and a route clearance...frequency change, next sector climbs to 310, then gets you a higher level if requested, then you switch to another sector usually for about 1 minute then to another then to Paris or Reims
Hope it's clear