What's also weird is I drop with a delay, drop..pause a sec, drop. Marks on ground RIGHT next to each other. That's certainly not correct either.
If you think about it, it does make sense. You are traveling at a certain speed in a dive, so you are losing altitude. You drop the first bomb from 2000 feet at 300 and then you wait, and drop the second one from 1500 feet at 325 (throwing out numbers). The trajectory of the last bomb compared to the first is going to be flatter, but has less distance to fall while your first bomb will have a much steeper trajectory at a slower speed with more distance to fall. I'm sure you'll find that if you do the math, that little difference in altitude and speed is what makes the difference.
