I have moved my site this week from development to Siteground hosting, using a temporary domain until we complete testing. After working through getting things set up on SG, I now see all my Woocommerce things in single column (Shop page, Woo Dashboard). I don’t know if a setting was changed during migration, or if recent Woo updates could have caused it. Appearance/Customize/Layout/Woocommerce still shows Product Columns 3 like it did before. Not even sure where to start looking, any assistance appreciated.
OMG, that corrected the problem! I have no idea how/why/what settings in SG optimizer affected the woo column settings, but I will contact SG and work with them to figure it out. You are a genius, thank you!