Iphone - Multiple Apps, Different App ID, Same Token

Question

From what I understand, if there are multiple apps with different App ID installed on a device, the tokens for push notification generated for each apps should be unique one

Answer 1

For development provisioning profiles, the device token will be the same for all other apps on that device using a development provisioning profile.

In production (the App Store), the device token will be unique for each application as far as I know. But I'm not 100% certain.

As for why the push notification wasn't delivered to your devices, that's hard to answer without more detail.