[Dx4win] Cluster/slimmer-related questions

[Barry]

Been connecting to a few different Cluster nodes with skimmer feeds and 
have noted the following issues:

1.  Busted calls - just about every morning KB4JR CQs on 30m and is 
mis-spotted by Skimmer as B4JR, causing a voice alert, as I need BY on 
30.  Any way to block this individual callsign from new country voice 
alerts?

2.  AR Cluster nodes spot the same call multiple times when received by 
multiple skimmers.  CC Cluster nodes are OK and limit the spot to one 
time.  Is there a way to limit the AR Cluster skimmer spots to only 
spotting a callsign once, either in the AR Cluster node or DX4WIN?

Tnx,
Barry W2UP