incorrect

I recently inherited my Dad's 2012 CR-V, and I'm having a problem when I play music stored on a USB drive. Although the information contained in the MP3 tags is correct, the songs don't play in the correct order - i.e., first number 1, then number 2, and so on. They're not even listed...

Hands up - I put another battery in the CRV, in the rain and the dark using my phone as a torch and connected the terminals the wrong way wround. Queue sparks a good beep from the horn and now nada - no electrical activity when I turn the key. Does the CRV likely have a safety device so only...