Since 1-2 months Claymore miner does not work on the multialgo or autoswitching algo for ETH/ETC/EXPANSE. it restarts after 15 min when miner switches to the devfee mining. I think you and Claymore needs to work things out.
Its probably due to the difference in the chains of ETC and EXP to ETH now. I am using allcoins 1 and allpools 1.