Car Filter doesn’t search all cars

Something wrong with Car Filter, it doesn’t search all cars.
For example, I choose from the drop-down box “Make” cars Acura or Mercedes-Benz doesn’t get any results “Sorry, No results”
The rest of the cars finds good.
I am using permalinks settings Post name ../sample-post/
Default permalink also don’t work good.
Why is that ?
here is my testing site with your plugin:

https://webs.atthouse.pl/