I noticed on a recent transaction that a wrong CC was charged. My default CC is not selected and I don't see a way to change it.
In Logos - click on your picture/avatar in the tool bar then select account. When you add or change a card you have the option to switch all pre-orders over to the new card. If you don't move them then, I think (but am not certain) that you have to go through customer service to accounting by phone, chat, or email.
OK, I figured it out. Billing Info: https://www.logos.com/account/billing
You select the CC you want, edit it, and select save at the bottom. It's a changed procedure from before. Not sure how it got unselected.