1) while canceling, it ask for which tkt / pax to cancel.. u can select the pax
2) Partial CNF / RAC / WL can TRAVEL PROVIDED, TTE APPROVES.
3) only full WL etkt PNR gets auto canceled if remains in WL after charting.. For partial CNF / RAC / WL, in case if CNF / RAC are traveling and WL is not traveling, u need to get Pax not traveled certificate from TTE and send the same to IRCTC NDLS for refund, AFTER FILING ONLINE TDR.