Hmm, would any of these posts be closer to what you're looking for? 
http://community.retool.com/t/dynamic-listview-row-numbers/4922
http://community.retool.com/t/how-to-store-data-in-temp-state-using-listviews/6444/9
Sorry for throwing all these links at you, just want to understand your use case before launching into repro mode!