If you're gonna hit 175, why UCLA??
Anyhoo, the stupid mistakes will hopefully disappear with practice. Brain farts happen, and that sucks. On my last real LSAT I missed an EASY games question because I misread a clue (twice). Just make sure that it's really due to misreading rather than misunderstanding. If you thought it said one word when it really said another, that's okay. Nothing to fix, just try not to do that too often. But if you thought it meant something else, that's a problem.
You should really spend a lot of time with the questions you didn't understand. Write out in your own words what the premise is, what the conclusion is. Write a full sentence or two explanation of each answer choice and why its right or wrong. Think about other questions you've seen that work similarly or have similar mistakes in the answer choices. Forcing yourself to actually articulate it (assuming your analysis is accurate) proves that you understand it. When that type of question shows up again, you're gold.