I think there is a mistake in how this mod currently implements Habitation. All the documentation in the GitHub Wiki suggests that @RoverDude intends a Kerbal-Month to represent 30 Kerbin days, or 180 hours. For example:
However, a Kerbin month is set as equal to one revolution of the Mun, which is 38.6 hours or ~6.43 Kerbin days, not 30 Kerbin days. See the Time page of the KSP wiki:
The result is that a single-seat pod, which defaults to 0.25 Kerbal-Months of habitation, provides only 0.25*38.6 = 9.65 hours of Habitation. This is documented in the wiki as one Kerbin week (I guess because Earth months are ~4 weeks long), but actually only represents 1.6 Kerbin days.
It seems to me that all the Habitation values are currently less that 1/4 of what RoverDude intends due to this (very understandable) confusion. This does not affect Supplies, EC, or EVA time because those are all handled in seconds instead of Kerbal-Months.
My suggestion is to either change to Habitation to work in seconds to avoid the vicissitudes of Kerbin time, or to change the number of Kerbal-Months of Habitation provided by each seat so that seats provide 7 Kerbin days (RoverDude's understanding of 0.25 Kerbin months) instead of 1.6 Kerbin days.