[Caerus]

I don't remember having any trouble with actually ordering the pack.

I do remember trying to bump the payment to $10 and not being able to. Adding an option to change the amount paid during checkout or making it much more obvious if there was one may have helped your "haul".

[thomaslangston]

Note that the humble bundle actually lets you increase your contribution "after" you've paid as well. They might be worth emulating there.