No I think in this scenario she really forgot her phone. He was going with her to buy drugs, she realized she lost her phone, he turned around to go get it (before Dublin's closed at midnight) and she was going to meet him back at Dublin's/Ollie's after the deal was done. I don't think DW is shady. I just think he told LE where he and DNV were going near the Shell Station but didn't tell JDT.
I mean the exact story from him to JDT doesn't make sense either: he was going home, Danni was going to Ollie's, but Danni who works at Ollie's followed him by accident across town? It makes more sense to me that they were running an errand near the Shell Station and Danni never made it back.