That's kind of the 'Catch-22' of the situation. Until started, the ECU is out of the formula and you are using the static timing value. Once up and running, the ECU can now specify and adjust (within its ability) the timing. Added to that, during warm-up, the ECU is going to specify more advanced settings anyways. The combination of both makes for a very rattly and disconcerting experience. Ideally, you should be able to advance your static timing enough to get clean starts but also stay within the adjustment range the ECU can handle. When you are over-advanced, I'm not seeing high duty cycles indicating the ECU is 'working' hard to retard your timing. There's a great thread about timing that I see you have already added a post to. If you have the time and patience, there are some interesting theories there worth looking at.
Were it me, I'd back the static down a bit and see if you can get the two to match. Try it after you have a warm engine, that way you can skirt (at least temporarily) the cold start issue. The values the ECU calculates are based on your CPS and #3 lift sensor so having lower compression is going to throw a wrench into the std. algorithms the ECU uses to calculate things. Your final settings may defy common logic because of this. Once you find that point, there are a couple things you can do to see if you can improve cold starts. One is the glow plug cycle. There's also an adaptation you can do in VCDS to "temporarily improve" starts. I don't remember the channel but if you log in and go through the channels, it's not hard to find. I think it just increases fueling when starting but it might be something to play around with. Finally, you might want to contact
oldpoopie here on Fred's as he runs low compression, has posted here before about issues with it, and is a bona fide TDI guru. Honestly, I'm "spit-balling" and he may have some more concrete suggestions.