Are you on a distributed env ? If so where have you installed the ad-on ?
Search time components of the TA should go on the search head to get the cleanest extractions possible.
In your case it seems that the auto-extractions are grabbing lots of weird fields and polluting your field list. In order to disable it modify your local
props.conf to include
KV_MODE = none that way auto-extraction will be disabled.
Are those fields showing over all time ? Click on one of the weird fields and check what the event looks like, wether its broken or not.
Also check if there are other places where the sourcetype might be grabbing its config from use
btool to verify that.