Financial Software Questions? Ask IT Support for Answers ASAP
I do not know if you still require help but many applications use a default or will default to the original entry.
If you have not done so yet, try deleting the old card all together. That should only allow for the new to be used.
Depending on the site you are trying to book this "ride" you may be able to then add the old again if you wish to have it in the account too.