Hi,
I fixed the second problem (content not aligned with background). Thus far, I haven’t been able to replicate the 1st or the 3rd problem. I have checked with other users who are using my plugin on WordPress 3.5.2 and they haven’t experienced any problems, so I’m guessing that the issue is particular to the theme or other plugins that you are using. What theme are you currently using and what other plugins do you have installed? I want to get this working for you, but first I need to replicate the problem.
In terms of beer costs, I’m going off about what each beer would cost at the average bar. The prices are more of an estimate and vary so that people can choose different donation amounts.