Upload & Sell: On
I do the same thing. I introduced myself to the DJ (who was from out of town and I had never met) and we went over things, but he still deferred to the wedding coordinator when it came time to announce the bridal party. He also told me that he was hanging it up after the next wedding. He said that he'd been in business for over 12 years and had enough.
Yeah we always talk to the DJ too. Coordinators can suck it, they just want to stick exactly to the timeline (or often times, whatever pops in their head, forget the timeline let's do stuff early!). We're lucky to work with the same DJs a lot so we have a good relationship and they keep us informed etc. and give us a minute or two as needed.