The first one is the issue with the plugin and the code that the creator wrote. Centrafuse gets a lot of crap from its customers, sometimes rightfully so, but unless a plugin is developed by Centrafuse developers, you won't get any support from them. I also have the same problem with that plugin and I don't think there's a solution, maybe except for just writing a better plugin yourself. Once I finish writing Spotify plugin, I might take a crack at it.
The second is one of those issues about which Centrafuse gets a lot of crap from its customers. Their response is usually that bluetooth connectivity is controller by the 3rd party BT stack, BlueSoleil. If something connects, disconnects, temporarily shuts down etc, it's most likely BlueSoleil's fault. In other words, if BT doesn't work - tough luck :-/