When is the best time to send emails?

The graphs/charts on this page do not really match up with the captions.

1) The second chart pretty clearly shows Wednesday as a higher volume day than Tuesday, and yet the caption reads "Tuesday and Thursday being the highest volume days."

2) Even worse, the caption on the third picture is completely off. The caption reads "Click Rates by Number of Links," but the text in the chart itself describes the number of clicks in terms of how many months a user has been subscribed.

What gives?