So I just tried to purchase 2 domains, the .com and .ca version of the same domain, which comes up shockingly often.
Doing so I discovered the following:
a) there is no way to buy more than 1 domain at a time, which is bad enough.. but
b) the money from the first purchase actually sits in your account for up to 15 minutes in limbo so you make the second purchase. This is because then the system would try to only charge your card the remaining balance.. in the case of a .ca domain it's $2.04. And there is a minimum of $10 for a credit card purchase.
In the case of a domain that is the same cost (like if both were .com domains) than I'm assuming the registration request would go through without the charge and then I'd owe the $11.95 at some later date?
This is just straight up goofy. Why make it so hard to take my money?