Hi,
I understand – the reason is still the option I mentioned previously. The plugin will prefer that post type order – and if there are more relevant matches from the preceeding groups, then those are shown.
You maybe want to look into enabling this one: https://i.imgur.com/80kpwjv.png
With that, the plugin will try to divide the results between each post type group equally. In your case, you have 7 post types selected, and 100 items to show overall. It will display then 100/7 ~= 14 items from each group. It will make sure to display matches from every post type group.