align problems

[Cipo]

Hello,

After i install purchase without account module, i have this problem: in basket window, conyinue shopping and voucher buttons are moved to the right, if i change (see first attach, alling1.jpg)
input.button_large, input.button_large_disabled, input.exclusive_large, input.exclusive_large_disabled, a.button_large, a.exclusive_large, span.button_large, span.exclusive_large {
width: 180px;
background-image: url('../img/button-large.gif');
margin-left: 90px;

to lower value (for proper alignment), another buton has moved, buy without registration (see the secound attach, allign2.jpg.

How can i fix?

Thank you

[Cipo]

Nobody can help me?