Best guess is the feed was automatically deleted due to inactivity. That's SOP for feeds that are down for 21 days. Last I heard was the provider was having computer problems, and I don't know if he'll be bringing them back at all.
To answer your question: fire/EMS and law would be ideally separated on two different scanners (or four SDR dongles), but really that's up to you and what you want to provide.