Looks like a recent update to the UI messed up the Drums version of
eq2ui_inventory_merchant.xml where it now looks like this at the bottom:
The text and check boxes are messed up.
I renamed the file so that it would load the default version and it looks like this:
I haven't really bothered doing any kind of code comparison. Just mentioning it in case some else sees the merchant window kind of messed up.