MarketPress Shipping not showing up at all

This doesn’t make sense at all – when you go to ‘Check Out’ on marketpress, the shipping option and costs do not show up there but rather when you go to ‘Check Out Now’ (seems quite redundant) and have to put in your shipping information. However, even on that screen, when you select the shipping method (in this case, USPS), no extra information is populated. Seems quite ass backwards. The total (inclusive of shipping) should be shown to the customer PRIOR to filling out the rest of the information. They won’t even know the total. Any help would be much appreciated. This is critical that we get this resolved because we’re looking to launch ASAP.