I thought I would experiment with multiple exposures again, but discovered when I got home that I had inadvertently disabled the multiple exposure and taken 3 separate shots instead. Oh well, next time we will try and get better at understanding this. Looking at my camera manual, I think it got disabled when I changed my ISO? At least this is a good way to learn and practice. Imagine if I was trying to do something like this for a wedding and got it wrong!