lol @DumbHollywoodActor it takes as LONG as it takes (and it takes quite long) but you're going about it right!!! It took me 3 - 3.5 months to foolproof whatever I did but I was exceptionally bad at games.
Have you been dong the FoolProof Method? Maybe go over the most recent LG's you've done, and see why you're missing those questions. Print a couple copies of each, and keep redoing them until you have all of the inferences down.
I would recommend doing them and using FoolProof Method. Flexible thinking and making inferences when the setup seems unusual can only help you. You're absolutely correct that the older, "weird" games are reappearing.
Blood, sweat and tears.
You need to work on LG. Getting -0 in LG will likely put you in the low to mid 170s. Complete the logic games bundle and use he foolproof method.