I'd ignore the dial thermometer. It is a completely useless piece of equipment and can be as much as 10 degrees inaccurate. Follow the digital temps and you should be fine.
Also, although you probably already know this... but please be aware that there is no guarantee that 2 leopard geckos will get along for life so a spare set-up would be a good idea in case they do start fighting. Also it'll do well for quarantine in case one should become unwell.
The UVB could be a little too strong for a crepuscular animal, but I may be wrong.