I understand your frustration and the inconvenience you've experienced, WW233. Allow me to help you this time and provide you with answers to the best of my abilities.

I can think of a reason why it happened. It could be that the Collapse activity row box is checked, which is why it's not printing the service date. 

Let's review the template and make sure the checkmark is removed. Here's how you could do it:

1. Go to the Gear icon and select Customer form style.
2. In the Content tab, scroll down. Click the Show more activity options.
   
3. Untick the Collapse activity row box.
   
4. Hit Done to reflect the changes.

Once done, go back to the invoice and make sure you apply the appropriate template. Open invoice> Customize> select  template. 

Afterward, you should now  able to print the service date.

Stay in touch if you have follow-up concerns. I always want to make sure you can service date and other information in the system. Bye for now.