Question
I have deleted a form(s), but now when I create a new form, the form number doesn't reset. How can I readjust the sequential form numbers to be consistent?
Example: I created a few Daily Report forms, and on the third form, I made an error and had to delete it. Now when I create a new Daily report, it skips over Daily Report #3 to Daily Report #4:
Answer
There isn't currently a way to directly reset the sequential form numbers. Once a form is created from a given template, it establishes a permanent form number, and even if deleted, the following forms created from that template are labeled with the next sequential form number.
Note: Each form will begin with the Title of the Form Template, followed with a form number. This part cannot be edited:
The description of the form is the customizable section of the title after the dash. You can customize this part of every form title, if you choose:
How to Fix
The best workaround is to duplicate your form template, which will then create a new form template, and the form numbers created from this template will begin from 1.
Steps:
1. Navigate to the arrow that points down, next to the name of the form, and click on the Manage template option:
2. From this screen, you will want to click on the Actions button and click on Duplicate: 
3. This will create a duplicate Form Template:
4. From here, rename the Form template the same as the template it was duplicated from and publish:
5. The new form template will be located below the form template it was duplicated from, and you can start creating new forms in which the form numbers start from 1:
More Information
Here are a few related articles on the 'Forms' tab: