AirPods Pro gen 2 authentic?

Hello,

I have purchased a pair of AirPods pro gen 2.

Checking the serial number on the side of the box I can see it matches that written on the inside of the AirPod charging case lid. The model number says A2700

Each AirPod then also has the same serial number printed as as the box

They have a different model number to the case (A2931)

Checking the same details inside my phone settings when connected I get a completely different serial number and also a different model number (A2618). It also says 2 separate serial numbers for each AirPod.

Both serial numbers (case and phone setting) check out fine on the apple serial number check.

i also have an issue where the AirPods will not seamlessly switch between devices, something I have never experienced. I have to ‘forget’ the items before reconnecting to a separate phone or laptop every time.

Could someone advise what the issue could be here or if this is normal?

Thanks in advance

Ali