Greetings, @DB62.

I appreciate the screenshot you've provided and for sharing the details you've performed. Let's open your QuickBooks Online (QBO) account on a private or incognito window to isolate the issue. This way, we can see if this is a cache related issue.

Data cache stored for a while causes unusual behavior to your browser and affects the performance of your QBO. Here are keyboard shortcuts in opening a private or incognito window:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Safari: Command + Option + P 

If you're able to view the preview of your imported form style via a private window, then we'll need to clear your regular browser's cache. This will delete all the browsing history from the browser and helps to function it efficiently.

However, if the issue persists, I recommend using other browsers to check if this a browser-related issue.

Additionally, I got you this article for additional details in importing your form style in QBO: Import custom form styles for invoices or estimates.

Lastly, you might also want to check this article that can guide you on how to record a credit card payment in QBO.

You can always get back to me if there's anything else you need help with. I'm always here to assist you. Take care and keep safe!