Was running some cupped washers, guessing that's what blew them our. Were really good though. Soft bones.
No that is just Bones bushings to a tee, any truck, any combination and that can happen.
Everything else that Powell / Bones makes are usually top of the line and really good, but Bones bushings blow out way to often, too easily and too quickly with the harder inner core either coming away from or just pulling through the softer middle of the bushings, more so in the soft than any others.
Running them with normal washers actually helps them last a bit longer in some circumstances, but this would be the sort of pic I would show people who would ask for Bones bushings and if they still want some, buy them at your own risk.
That said, some people love them and swear by them, but I have seen far too many end up in pieces, sometimes even on the first day, than I would ever like to say and have a long shoe lace full of all the broken ones for show and tell.
Mediums or even hards when not tightened down actually skate better than the soft ones for most people, the exception being the super feather weights or small bodies, and then the softs work really well.