In space, no one can hear you ... what was that line again?

I've just finished reading the Expanse Trilogy by James S. A. Corey:  Leviathan Wakes, Caliban's War, and Abaddon's Gate.  Definitely recommended reading - good well-written high concept science fiction, and it's easy to see why the first book was nominated for both Hugo and Locus awards in 2012.  But I do have one bone to pick with Mr. Corey.*

In Caliban's War, our heroes are on a spaceship that's escaping from a planetoid infested with alien monsters that can run around in vacuum, rip people in half and tear through steel plate like it's wet cardboard. The following conversation takes place:  

“Okay,” Alex replied, then hit something on a panel twice and frowned. “Huh, we have a red on the board. Gettin’ a ‘no seal’ on the cargo airlock. Might’ve caught some flak on the way down, I guess. It was pretty hot up there.”

“Well, we’re not going to stop and fix it now,” Holden said. “We keep the bay in vacuum most of the time anyway. If the inner hatch into the cargo area is showing a good seal, just override the alarm and let’s go.”

“Roger,” Alex said, and tapped the override.

Is anyone - ANYONE - surprised that later they find one of the monsters in the cargo hold? What, have the lessons of Ellen Ripley been completely lost with the passage of time?

- Sid

* Which is actually a cooperative pen name for Daniel Abraham and Ty Franck, but let's not pick nits while we're picking bones.