This has some similarities to another recent post ...
The first point I'd like to make is your problem is easily resolved if Q2/Q3 are on a separate page to Q1. Some simple skips would need to be implemented on Q2/Q3 of course (as you indicated).
Q1 (page 1) is asked. If YES, display Q2 (page 2). If NO, display Q3 (page 2 or 3 - either will work).
If you are keen to have it displayed on the same page, you should contact Sawtooth directly for a possible solution.