The complete fat block is 3 grams. However, when you eat low fat protein it already typically contains 1.5 grams of fat which counts towards you total fat allowance. It means that you need to add only 1.5 grams of fat on top of that. Practically all the protein from the favourable list contains some fat and hence the addjustment. However, if you eat fat free protein, or such protein which contributes much less than 1.5 grams towards total fat block, you need to use extra fat in your food - so the TOTAL amount per block is 3 grams.
Wine is an unfavourable source of carb so limit the use of it, as a drink, to one block for meal. If I have a small glass I count it as 1 block, if I add a little of it to my food and cook with it - I do not count it at all actually, because the alkohol evaporates and what is left I do not count. Of course, I am talking about a little bit of it not the whole bottle added to your cooking.