Loading Multiple XML Files Into SQL Server

I'm using the For Each loop container to load multiple XML data files into SQL Server, and noticing some peculiar behavior and need some advice.

The pattern I'm trying to accomplish is this: Iterate over a collection of XML files in a specific folder, loading each in turn into SQL Server. If the file has already been loaded, delete the records first before the load. After the load succeeds, move the file into an Archive folder.

To accomplish this, I've set up a For Eac Loop container using the For Each File enumerator, and retrieve just the file name and extension into a variable. The first task in this is an Execute SQL task that uses a SQL DML statement to delete records based on a field in the table containing the file name (DELETE FROM table WHERE PROG_NAME = ?), and map a variable to the parameter. The next task is the data flow task that uses an XML source using the variable as the file name, and SQL Server destination. I use a derived column task in between to plug the variable holding the file name into the PROG_NAME field. So far, so good. This works.

But now comes the peculiar part. I initially had the XSD files in the same folder as the XML files, but wanted to put them in their own directory, so moved them, and made the change to the XML source adapter for the new path to the XSD file. The next time I ran my package, it failed. For some reason, as the For Each Loop tried to iterate over the directory, it was using the XSD path assigned in the XML source instead of the path for the XML files. Unusual...

My question is, why when choosing the File name & Extension retrieval type (as opposed to the fully qualified name) will the task try to use the XSD location to find the files? Is my variable getting reassigned somewhere?