zl queue vs stack inconsistency

From the zl reference, >>Messages>>Mode:
"queue: functions as a first-in-first-out (FIFO) stack; it outputs the oldest message received. "
"stack: functions as a last-in-first-out (LIFO) stack; it outputs the most recently received message. "
Note the use of the term "message". From this description, I'd expect queue to basically be the opposite of stack, which is what I'm looking for, a FIFO stack for messages.

But in the Output section of the zl reference, I find the following:

"In queue mode, the oldest element received."
"In stack mode, the most recently received message. "

Which seems contradictory to me.

In the following patch, you can see that zl queue does indeed break the message into elements:

Is there a way to have zl queue work w/ the entire message as opposed to its list elements?

Thanks for any expertise.