I thought that was an omnious sign too, but that didn't detract the enjoyment of this chapter. I like Cynthia too, so I hope she is able to come back from the West. But...Clare is expendable now? *add negative smily*
I can only guess that the disfigurement on Claymore bodies is a visible piece of the Yoma they took into their bodies. In Clare's case specifically, I'm going to guess she has Teresa's face on her stomach.
This manga certainly has been building up many interesting and promising results to the story and characters. Too bad we have to wait until October though. :(