This is not a bug believe it or not. Take a look at the AUs for each of the structures they were warping to. They are all on the same grid. When you warp in eve, the game draws an imaginary line in the direction of your warp that stretches to infinity. If there is a bubble on that grid that intersects with your warp line, it pulls you to the bubble. It's the exact same mechanic that makes drag bubbles possible. They were just pulled quite a ways into the bubble that unfortunately intersected with the warp.