That was what I heard/thought, too.
I'm not so sure that 'unforgivable' is adequate. I think even this is up to the discretion of God. For instance, I know of someone that is buried into his bible. He was a camp counselor at some bible camp. He studied psychology and wanted to be a youth counselor at his church. Yet, he was tormented because at some time in his past he had blasphemed against the Holy Spirit. I forget why he had done so. I have to believe that God looks at circumstances which might have led to such a thing.