Mining sync from a sync pool will end at the end of the 5th day. However the multipool you are mining on doesn't actually mine sync it mines other coins and then sells them and then buys sync and gives all the miners a proper share of it based on how much they mined the coins that got sold. It's a workaround the end on mining stage. It also creates demand for the sync coin as it constantly buys sync coins after dumping the shitcoins it mined. So keep mining on that pool. I mine on sync pools and the mutlipool. I use srypt asics (Gridseeds) to mine the multipool and gpurigs to mine the sync x-ll pool. The multipooled paid out today so it will be at least a day and a half before it does so again.