By default (irritatingly!) the software shows your pictures with the oldest at the top but you can easily change this.
Click here to go to the "Change how my gallery looks" page in the Control Panel .
Change the "Photos Sort Option" to either:
- "Date (Descending)" (the most recently uploaded photos at the top) or
- "Picture Date (Descending)" (the most recently taken photos at the top)
While you're there, change "Photo Listing Arrangement" to 6 columns and 50 (or more!) rows so that all your pictures appear on a single page.