[T77911S]

here is what i see going on. after 20 sec, the 2.2 rise to 2.5 should be the thermo time valve (TTV) opening up and alllowing vacuum to raise the CP. would like to have seen about a .5 bar change, but maybe the .3 is due to warmer outside air. you can always check the difference when it is warm by removing the vac line and checking the CP change.

the WCP looks a little low, but in spec. 3.5-3.6 would be a little better.

here is where the problem comes up. it looks like your aux air regulator (AAR) and perhaps the WUR, think the car is warm. IE, the AAR closes too soon and the idle drops too low because the engine is still cold, you compesate for it be changing the idle, then the engine warms up and the idle comes up, then you lower the idle again to where it should be.

you can always just set the idle where it should be when warm, and live with it. i i dont think i ever let it just sit there and idle for that long when it is cold. i usually hold the RPM's up to 1500- 2k anyway. or i am usually slowly driving. i take it easy out of my driveway and past the judges house, not that he cares. he told me he is in bed and says to himself, there he goes in the little car, time to get up.

12.8 is quite rich, i think i have mine set around 13.8, cant remember now. the 12.8 could be due to the low CP. you can either lean it out , try changing the WCP or buy a new WUR.

i am not big on adjusting the CP's because i believe there is a reason why they are not right, usually it means the WUR is going bad, but you could try raising the WCP to increase the warm up time and lean it out, but you risk getting them all out of wack.
if you raise the WCP, the metal strip(which goes bad) may not be able to bend enough when it gets hot to give you the 2.2 CCP to 3.6 WCP change that you are looking for.

if it was me, i would adjust the mixture and keep an eye on the CP's and just use my foot when it is cold.