Unfortunately, this is a current limitation of the plugin for the exact reason you mentioned. It essentially uses Bubble to pass through lists of text and then parses them into a CSV. For the exactly reason you mention, once the plugin is processing the list it has no way to differentiate what items should be grouped with a specific row.
I have this on the back burner to resolve. Send me a PM with exactly what you are trying to do and I’ll take a look at it again.