Sorry. I'm still styling some of the cart. Also, due to the nature of the business, you have to chose a shirt AND a design before you can add them to the cart:
Click order now in the top right, then chose option A
Choose any apparel category, then a type (Short sleeve, then 50/50 tee for example)
Enter a number into any size box (at least 12) then click submit at the bottom.
Click the words that say "Click here to add your first design"
Choose a design category/design, then choose two ink colors in the colorizer. Click "Select these colors"
Select full front and click submit. Dont worry about anything else on that page.
Finally, click "add to cart". It will (annoyingly) be on the right hand side, between the apparel and the design. This will take you to the cart.