Could you show us your Claymore script?
Below is the example script for dual mining with claymore (nanapool)
EthDcrMiner64.exe -epool eu1.nanopool.org:9999 -ewal YOUR_ETH_WALLET/YOUR_WORKER/YOUR_EMAIL -epsw x -dpool "http://sia-eu1.nanopool.org:9980/miner/header?address=YOUR_SIA_WALLET&worker=YOUR_WORKER_NAME&email=YOUR_EMAIL" -dcoin sia