Good evening, @Kchampion.

Are you receiving any error messages when you try connecting the three accounts? If you are, can you provide me a screenshot of the message or give me the details by leaving me a Reply? This will help me get a better understanding of this behavior.

If you're not receiving any error messages, then let's do some troubleshooting to see if it's a browser-related cause. Let's clear the cache of the web browser you're using for QuickBooks Online. These files can become outdated, causing issues like the one with not being able to connect your accounts from PNC. Here's a link to help you with the process: Clear Web Browser History. 

Let me know how this goes for you! I'll keep a close eye out for your response. Talk to you soon.