Skipped Purchase Order Numbers

[NordicTMC]

I have had to search in ST for some of my purchase order numbers to track them down. On some, I get a message saying "Not Found" meaning they aren't in ST although they should be. A co-worker was told that some of our numbers are getting skipped. How can they skip? Sounds like a glitch that ST needs to fix. Does anyone else have this issue?

[KMarshall]

In our setup Service Titan uses the same pool of numbers for Jobs and for Purchase Orders. So if a Purchase Order was created first and the next number available assigned was 12345, then the next transactions created in the system was a Job, the Job would be 12346. Then a Purchase order created next would be 12347. Not skipping numbers, just using the next one available. Also if a Purchase Order or Job was canceled that number would not be available for re-use and you have to search separately in the Canceled section.