What's with the organize option?

Is anybody else having this sort of issue? When I'm trying to organize my Pins, there always seems to be a glitch of sorts.

The issue is mainly with the "move" feature. When I try and move pins into a new place (like a section or a board), the pins themselves will appear there, but they also don't disappear from their original section. It's like they were copied when I didn't choose that. And then, when I try and move other pins, there is an error message saying, "Please wait until previous action is finished" or something like that.

I'm genuinely confused by this. Fortunately, I don't do it very often, but it's an ongoing issue that annoys me so much because I used to be able to move like 90+ pins in one go. After, I needed to restrict it to less than 50 to avoid glitches. AND NOW, I can't even move 4 without it happening!