Multiple Vehicles Does Not Work

Trying to allow adding of multiple vehicles but without success.

You can select the first vehicle as normal but it will not allow you select a second vehicle correctly.

Here’s how I want it work:
http://www.carqueryapi.com/demo/multiple-dependent-selects/

Here’s my site – which does not work correctly:
Here’s a test http://equoteninja.com/test-multiple-vehicles/

I assume I need to create unique instances for each like [cq-year] [cq-make] [cq-model] [cq-year2] [cq-make2] [cq-model2] but haven’t been able to modify the php to work yet.

Wondering what part(s) of the php should be modified for this. I will post back tommorow with what I have tried so far.

https://ww.wp.xz.cn/plugins/carquery-api/