Hi HDG,
The transaction numbers for sales and purchases in MYOB are automatically numbered based on the sequence in which they are saved in the system. This means that the system generates the next numeric transaction number based on the last recorded sale or purchase.
Regarding the issue where the purchase order number changes to the next in the auto system, you can change
this in your software preferences. To do this, go to Setup > Preferences > Purchases. Please refer to the attached screenshot for guidance.
In addition, since job numbers are appearing in the comment section of new orders, you can also check and adjust this setting in the preferences of your software.
If you're still having issues, you can contact our support team. The best ways to reach them are through live chat via our virtual assistant MOCA or by raising a support ticket through myaccount.myob.com.
Regards,
Earl