I can help you sort this out, @dstahl.

Let's start by accessing your QuickBooks account using a private browser or incognito browser. This way, we can isolate this unexpected printing behavior for possible a browser-related issue. You can use either of these keyboard shortcuts:

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

Also, you may have transactions that were modified causing the checks to print an incorrect order. You can reset the check number sequence by enabling the Custom transaction numbers from the Sales settings.

Here's how:

1. Go to the Gear icon.
2. Select Account and Settings.
3. Choose the Sales tab.
4. Click Sales form content, then select Custom transaction numbers.
5. Hit Save.
6. Click Done to finalize the changes. 

Once you set one check number, the system will increment the number by one when you create another check, or the rest should generally follow in order. Now, you can start printing it.

Feel free to leave a comment below if you have other printing-related questions. I'm always here to help.