I am running a multisite cluster on Splunk 6.2.5. Is that why? (does the GUI not support managing a multisite cluster yet)?
The Edit button is disabled for multisite clusters. See http://docs.splunk.com/Documentation/Splunk/6.2.5/Indexer/Configuremasterwithdashboard
The Edit button is disabled for multisite clusters. See http://docs.splunk.com/Documentation/Splunk/6.2.5/Indexer/Configuremasterwithdashboard