So I ran tonight from the same spot, same venue, different band. The sound guy had the same issues with the "lispy" sound at the beginning of the first set, but he got it under control and virtually eliminated mid first set. When I asked him about it, he said that he definitely heard it and it took him a few songs to figure out how to get rid of it, but he did. He stated that it was difficult because they brought their own board and had used it the night before in more of a concert hall, and last night was more of a "bar" type acoustics, and that is why it took a few songs to get dialed in.
So, I am closing this topic now that I know it was not a SBM-1 issue.
Thanks all for the responses!
Nick