At one point I played a lot and also got a single 180. Probably several dozen bounce-backs from the wire but not a single split dart. Always found it strange that people say this happens often.
The valley created by the two fins of the flight basically made a path right to the join point. Of course, maybe it was my throwing style that caused it to happen more to me than others?
Only had a few that actually stayed stuck into the already landed dart, but it was quite funny when it happened the first few times. After that it was just a bother. Probably happened ~10-15 times IIRC. (It was ~30 years ago).
I had a good bristle board, but I recall spending much more on darts (weighted, various shaft materials, and an uncountable number of flights, etc.)