The amazing part is it was all working fine until I caught this this morning. The front page definitely HAD the shortcode. Last night I finally got MaxCDN running so that could be involved.
Dumb question that you can pass on if you prefer as it's not your code: Is there a simple “Disable” function for W3TC? I don't see one to just turn it off and then back on.
Thanks again for the great support.