is there a booze to fat pathway
Yes! Unless its pure alcohol (vodka, whiskey) there are carbohydrates in it. Alcohol is a poison at any dose, but it uses the same pathway as fructose metabolism in the liver.
I was surprised today that I seem to have put on some extra fat.
Is your body fact percentage quite low already? Your body might just up adjusting to optimal.
Eat more fat if digestion is too slow (code for difficult pooing) eat less if it's too fast (loose poo)
This advice is good, but its focused on your ability to produce bile, it doesn't really go to your bodies nutritional needs. Hunger and Satiation are the main regulators of "having enough"
Are you hungry? Are you forcing yourself to finish meals?