Hi Esmi, thank you for your reply.
First I tried two free ecommerce themes from the wordpress site (went between travelfy and virtue). The two seemed to leave “residual” content as I went between.
I now am using Mystile, from woocommerce. I read on a previous thread that this forum is only for wordpress themes, and Mystile is outside of that category. However, I had this “residual” issue when switching between the two wordpress themes, as well.