You only remember the ones where the plot goes totally off the rails, dialogue makes no sense, and acting is just bizarre. Whoever is writing this trash is chronically incapable of producing anything even remotely good. It’s either forgettably mediocre or experimental chaos and pure madness.
Dreams feel surprisingly normal and real, and I think that has something to do with the way your mind works while dreaming. At least I seem to lose my control of emotions, which can result in violent outbursts, and other types of uncharacteristic behavior. Also, my critical thinking abilities are mostly gone while dreaming, so I’ll just go with the flow and fail to realize how wrong everything is.
I’ve also had a few crossover dreams like the one you mentioned, but those only happen if I’m in very light sleep. If my dreams involve a false wake up, it’s because I’m aware that I need to get up. Normally, that level of awareness is disabled or otherwise unavailable. Probably doing some sort of defragging, updating and maintenance in the background.