The sound channel should be removed when you delete a sound source, I’ve seen simlar issues though, specific modules will be the cause so I’ll need to track down which.
re. clock sync/deta - yes, that’s annoying me too, I’ll add it as an enhancement. The clock should send a delta along with the bang event so different sequencers can be in sync.
This absolutely isn’t designed to be a eurorack simulator though, I knew people coming from that world would find some things odd!