When Dana goes to meet up with Vince and friends out in the desert, there is a woman in a yellow maternity top standing close to Vince. When they see Dana driving close, the woman is still there, but when Dana is getting out of her car the same woman is seen coming down out of the motor home. There is obviously not enough time for her to go into the motor home then come back out.
When Vince responds to Jared's first letter, it's obvious that it's just a first draft since the version that Jared opens had been rewritten. However, the voiceover ("...and awful nice of you to write....") while Vince is writing, and then when Jared is reading,
does not match either written version:
"...kind of you to write...."
and then,
"...and real read of you to write. Thank you....".
Last scene as the bus leaves the station, a soldier is shown walking on the grass. Soldiers only walk on grass when mowing or weeding it.
When Dana is at the kitchen table on her laptop and talking to her mom, you can see her hands floating over the keyboard. Her fingers move up and down, but she doesn't actually type anything.