Duralogs and smoke. Our house got really smoky today, not sure why.?

We just had our chimney swept yesterday so I know our fireplace is clean. We burned one duralog last night and it went great (color-changing log). Today we got another duralog to burn (crackling noises). However, not sure what went wrong. we did everything according to instructions and the whole house got smoky. The smoke detectors went off!! We closed the gl doors to the fireplace and its better. However, you can Still see the smoke going up the chimney. What the heck happened!? My husband doesn't want to deal with this mess for the rest of the winter. I would love to find out what happened so it doesn't happen again. This fireplace was cleaned yesterday, this was the second time it was used. Help!