I had same issue and this is what PIA instructed me to do:
Many users find they need to enable port forwarding in order to get the best speeds and connectivity with torrent clients. In order to enable port forwarding in our client, enter the Settings area for our client, and click the Advanced button. Enable port forwarding and select one of the following gateways:
Netherlands
Switzerland
CA North York
CA Toronto
Romania
Sweden
France
Germany
After enabling port forwarding and re-connecting to one of the above gateways, please hover your mouse over the System Tray or Menu Bar icon for our client to reveal the tool-tip which will display the port number. You can then enter this port into your software, like uTorrent or another torrent client.
This should help your uploads
Matthew K, Level 1 Tech Support
Private Internet Access™
Hope this helps