Thanks for sending these through! We have been able to replicate the issue on our end and added it to our Bug Tracker. We will be issuing a patch as part of our upcoming Version 1.5.0 update to address it.
As for making the cards and card images bigger, you only need to provide images of larger dimensions to make them bigger. You can specify a Card Base of a larger size using plugin parameters or notetags and it will assume that is the default size of cards for spacing in Menu and in Battle. Make sure to change the plugin parameters for Max Hand Width and Min Card Separation Width to match as those do not adjust automatically and need to be specified by the user.