Hi gb
Yeah the main screen is landscape and the other screens are portrait on all devices. The main reason is that the setup & help screens are taken straight from the AltAzAlign app and I didn't rotate them to landscape mode as I believed you'd only be in those screens very rarely.
The text in the help page (along with everything else on the iPad) is just a multiplication of the original iPhone version. The bug in the iPad is purely because when I coded the algorithm to change the screen sizes I must have missed the second part of the moon phase block.
Cheers,
Simon