Hard to give a good explanatoryization of that crircumstanabilities as Yancy might say but the math does work.
The bottom line is if you take the 3,814 for your CDP YOU in your CC with a score of 33 and a bonus of 190 as it was a CC or WGT tournament you should get:
3814 + 190 + 33 * 1.04 = 4,198
(imagine that LOL it actually worked and matched your picture above)
Your CC got an extra 10% so ... 4,198 * 1.10 = 4,618
Now as to the whatnots, whereabouts, and all the other confusicatories of the points after the first shot being 150 higher then in the end there is no explanicables I have other then after the first shot MAYBE WGT assumes you are playing an 18 hole stroke round in WGT tourney (same as a CC Tournament) and when it turns out to end in a 9 hole round it reverts to the score for 9 holes.
The problem with that one is and 18 hole round is 400 (IIRC as had a few too few beers) and a 9 hole round is 190. - so there is not a 150 XP difference there. Other then if it were assumed a 18 hole round and WGT assumed you not being in a CC where you get you bonuses you do - then it would be close.
So just like smooth meters some times works smoothly and somethings work meters work unsmoothly ....
Heck this is WGT and they do not like to spend time telling us - we just have to figure it out as best we can by ourselves.