You're better off logging in to stream.directv.com/guide on your computer's browser and setting recordings directly from there. Your favorites will also carry over across devices.
Unfortunately TitanTV is powered by FYI/Red Bee who is the worst out of the 3 major listings providers, so it has the wrong listings for many channels and hasn't been kept up to date on lineup changes. Like at quick glance their stream lineup is missing NFL Red Zone, MLB Net alternate, Merit Street, Grio, CNN International, Recipe.tv, AMC+, Outdoor Channel, Next Level Sports, Willow Cricket, Willow Xtra, MLB Strike Zone, NBA League Pass, NBABet and the out of market RSNs. Most markets are missing their recent CW/MyNet/Ind additions and aren't using the correct hyperlocal listing for their in market RSNs. They're not using the streaming feed listings for Freeform and H&I. They only have generic listings for the 4K channels, Tastemade, AccuWeather, the FAST channels in the 4000s, and most of the international channels in the 400s and 2000s, while some of the ones they do have listings for are showing the schedule for their domestic feeds instead of their US/International feeds.