Odd and even pages options are mixed in pdftocairo and pdftoppm

Odd and even pages options (-o and -e respectively) are mixed in pdftocairo and pdftoppm.

 -o     Generates only the odd numbered pages.
 -e     Generates only the even numbered pages.

But the result is just the opposite

pdftocairo, pdftoppm version 0.80.0