Lucy Show Season 6 DVDs Out of Order?

[LoganCMD 2]

Can't find any mention of this online, so I thought I'd post here. Recently acquired the complete series DVD set of The Lucy Show, and have noticed that the Season 6 episodes are out of order, placing Lucy and the Pool Hustler as episode 16 rather than 13, the Carol Burnett episodes as 13 and 14 rather than 14 and 15, and Lucy and Viv Reminisce as episode 15 rather than 16. Anyone know why or how that happened? There's usually such loving attention to detail on those DVDs...

[Sdolginoff 1]

I'm not sure about this, but sometimes there is a difference between "production order” and "aired order" - maybe that's what happened here?

[upperco 72]

The DVDs are in airing order.

12/04/67 - "Lucy And Carol Burnett (I)"

12/11/67 - "Lucy And Carol Burnett (II)"

(12/18/67 - rerun of "Lucy And The French Movie Star")

(12/25/67 - rerun of "Lucy Gets Trapped")

01/01/68 - "Lucy And Viv Reminisce" 

01/08/68 - "Lucy And The Pool Hustler"

Any episode guide that states otherwise is incorrect.