The West Brom striker was pictured outside Loftus Road on Thursday evening, despite his club revealing they had not given him permission to speak to QPR.
Redknapp told Sky Sports News: "I feel sorry for the lad and the way things have turned out. I think he was advised that he should turn up, that the club had made an offer and it was accepted.
"I think the wires must have got crossed somewhere. It won't get resurrected at this time of night, it's too late."
Despite not capturing Odemwingie, Redknapp still enjoyed a productive transfer deadline day, securing the signings of defender Christopher Samba and Spurs duo Jermaine Jenas and Andros Townsend.
"We lost a fantastic centre-half in Ryan Nelsen but bought another top one in Christopher Samba," said Redknapp.
"That was good for us as it was going to be difficult to replace Ryan.
"Other than that, the other deals have been already done, so it was just the two lads from Tottenham really."
Redknapp believes the new signings have boosted QPR's chances of Premier League survival.
"It's going to be difficult but we're bang in there," he said.
"We've still got a big chance. We just need to put a little run together, get back-to-back wins, starting with Norwich on Saturday."