Is this normal?

This is after 2 hours of burning. Whenever I blow out this candle the wicks crumble off into the wax. It even sometimes sends up sparks. I don’t mind the flecks in the wax, but the sparks are alarming. I trim the wicks in between each burn.

This is after 2 hours of burning. Whenever I blow out this candle the wicks crumble off into the wax. It even sometimes sends up sparks. I don’t mind the flecks in the wax, but the sparks are alarming. I trim the wicks in between each burn.