New Stick Up Can Plug-In Issues

Hello everyone! I've had a ring doorbell 2 for a few months now with no issues, and yesterday decided to add a Stick Up Can Plug-In. This thing has been nothing but issues. First of all, the WiFi reception from its location has been horrible, even though I had a different (and much cheaper) WiFi camera in the exact same place with perfect reception. No problem, I had to move my Chime Pro to the closest outlet in the house, which is literally about 15 feet away from the camera and now I've got about -55 db. Even with that, connecting was a bit of a pain, and I had to go back and forth between the chime network and my WiFi a few times before I could finally connect to live view. Now that that's settled, I noticed a few other buggy things. First off, I bought the plug-in version and hooked it up as recommended in the manual and app, but wasn't able to get the camera to function well without a battery. Now with the battery installed everything seems to be working, and the device is charging the battery, but it's giving me a notice that my transformer is underpowered? Makes no sense since I'm using the stock Ring cord that came in the box. Also, maybe unrelated, I can't get the siren to work. When I hit the button the camera makes one quick chirp as if it's going to start going off, and then nothing. The app behaves as if it's working fine, and I can click the button again to "shut the siren off" even though it's not sounding in the first place. Anybody else having similar issues? For a brand new device I shouldn't have to worry about these sorts of things.