Hello there, leaseholdcleanin.
I'd like to know which one you're trying to print. Is it a report that contains an invoice number? I tried to print invoices and reports that have invoice numbers, and they are all in order.
Meanwhile, let's check to see if this a browser related issue. Open a private browser and try to print the list of invoices from there. If it works fine, go back to the regular window and clear the cache. Too much cache can cause unusual browser behavior. Also, try to use a different browser like Google Chrome, Internet Explorer, and Mozilla Firefox.
Please let me know how it goes. I'm here to help.