Swanny, you can't have the same URL to the photo pages every time and still maintain all the functionality of PhotoPost.
Take #1 and #2 for example. In #1 you went to the photo via the Recent Photo Uploads feature box, clicking on the NEXT button will take you to the next most recent photo uploaded. In #2, you went straight to the photo within a category, so pressing NEXT on that page will take you to the next photo in that category.
Passing parameters is required if you want to maintain the continuity of what you are doing; otherwise regardless of how you get to a photo, the NEXT and PREV buttons will only work one way and not the way people expect them to.
Please do not PM me for support or sales questions. Thank you for your understanding.