There have been instances where the app isn't communicating with your PVR; please ensure that your PVR is powered on (or at least in standby) and that you've rebooted it. If this doesn't resolve your issue, I'd recommend chatting in with an agent at telus.com/support for troubleshooting
Honestly it's a mess.
I was trying to delete some recordings using the web app and in the process, in one case it removed the series recording too and in another, it deleted multiple episodes of the same show when I had just asked it to delete one.
Don't rely on the app to manage your PVR recordings.