Two different scenerios: the first one has happened at least twice and the second happened the other day.

The first one: For me during stops, I line up with the cars in the intersection and don't filter, split lanes, or whatever it's called. I'm coming up to a red light and taking the straight through lane because I'm going straight. There is also a left turn only lane. At least twice recently I've had cars go around me in the left turn only lane and then cut over to the straight lane. Of course, they stop in front of me because there's a red light. Yesterday someone honked at me because I was taking the lane and did this move, then had to hit their brakes, and they saved what, 2 sec at most?

The second one: I get over to the left turn only lane after signaling a ways before I get in the lane and I made sure it was clear. Once in the turn only lane, I'm still holding out my arm signaling that I'm turning left. There are no stop lights, but just a straight thru and the left only lane. A car passed me and then at the last second pulled into the left only lane in front of me to turn left.

I have no idea how to prevent them because I'm clearly making my intentions known by taking the lane of travel to where I'm going, signaling like I should be ahead of time, etc. Do these things happen to you guys as well?