Hey @c.boggs,
As I didn't have a live event for the same, I verified this using make results on Splunk 7.0.0 Standalone machine, by installing the latest Windows TA-5.0.1
Things did work as expected for me, source converted to XmlWinEventLog:Microsoft-Windows-AppLocker/EXE and DLL while sourcetype to XmlWinEventLog
I don't think there is an issue with TA.
Still a sample event from you can be helpful to crosscheck.
PFA of my sample event got correctly assigned source and sourcetype screenshot.
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