A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
Once I sent two emails about a RT describing different issues on the outbound and return. DL combined them and answered once. It seemed to me that I was a victim of the 1 + 2 = 2 problem. I vowed then to not send them at the same time ever again.
However, if OP considers one of the issues significant enough, this could warrant a real mailed letter, with an email about the other flight.