When using the same form in a Form Display part more than once, the Display Name you enter for the last one of those forms added to the form display part will be shown as the title for all of those forms when viewing the form on a page after clicking Start/Re-enroll.
Our Product Development team has reviewed this issue and its impact on the software. After careful consideration, we have determined that we will not be addressing this issue. As an alternative, a single Form Display part can be added to multiple pages in order to target content to a certain group. You can also create separate Form Display parts which have the same form(s).