Thank you for noticed this bug. It is related to the X-Payments integration.
Here is the patch "HelpDesk File area -> X-Cart Mobile -> Support files -> x-cart-mobile-patch-1.3.0-1.3.1.diff"
You can also get it by this
direct URL.
It contains corrections for the one file "skin/common_files/modules/Xcart_Mobile/modules/Fast_Lane_Checkout/checkout_3_place.tpl"
Please, apply it.