Roy O'Donovan's penalty miss followed by Chris Hackett's sending-off set the tone for another poor awayday as Aidy Boothroyd's men then went down to goals from Straker and Eastwood.
"While Chris Hackett is a terrific player for us he was very naive," was the manager's verdict after the game.
The hosts maintain their 100% start to the League Two campaign and assistant manager Dave Penney was full of praise for his side.
"It's the work rate of the players which is proving key at the minute and that made the difference again out there."
Following their League Cup exit at the hands of MK Dons, Town have been drawn against the same opponents in the 1st Round of the Johnstone's Paint Trophy.