Ive been thinking about this all day. There are many orphaned blocks from miners in pools. It seems to be a network latency issue. The target spacing is currently set to 2 minutes. If the target spacing is changed to 5 minutes, it should fix the latency issue with pools not syncing properly within the 2 minute target space. Tomorrow I will setup some more seed nodes around the world, and update the source code for a 5 minute target spacing. I have made an issue on the susucoin-project github for this.
https://github.com/susucoin-project/susucoin/issues/1