Hi there, Janice DCL. 

Thank you for sharing a screenshot. This helps me identify where the issue coming from. Base on the screenshot provided above It appears that there is a default job associated with a customer.  

Thus, If the Customer Exists and has Job Data and activity, and Later, you want to make a Job, it will force the existing info into "Job 1." 

That said, there would be no reason to Make Another if you already have one. If you have them and want to clean up the list, you Merge the job into the customer name by first Promoting the Job to the Customer.

I've also added this link on how to track job costs in QuickBooks Desktop for your reference. 

Please let me know if you need more help with setting up job costing by leaving a comment below. I'll be right here to answer them. Stay safe!