ST 8.9 ni iten in the cart on checkout (mobile)

Hi’
Took me a long time to realize this but if i enable “Mobile Website” i have no buy it link or button and if i disable it then i do, but after adding an item and going to the checkout the item has been removed. ive only tried this on my galaxy s4 on chrome and the default Samsung browser and both do the same, so here is my site url if it works ok for others then it might be me.

https://swcproducts.com/