In Servicedesk 7.5 Mp1 - all builds, on initial incident creation, the priority of the task shown in the process view page does not match the priority of the inicident. This can also be seen by a review of the My Tasks List report. All tasks show with a "Normal" priority.
This occurs because the priorities are hard-coded for the default list of priorities. While users can change the priority in Process View, those priorities are not available during initial incident creation. Also, the ability to use the custom priorities that can be stored in the Application Properties are not available to the initial incident creation process.
This is a feature request and will be included in a later release of Servicedesk.