From 2010 or 2011 (year not sure) onwards 01067/68 has been running as LTT-TEN-LTT, before that as you said it was running as LTT-KCVL-LTT for quite a long period. Even for 01065/66 CR always proposes to run it up to TVC but SR rejects the proposal stating that TVC is unable to handle it.