Japan Bus Pass Condition?

I'm about to buy the japan bus pass from WILLER TRAVEL,Inc., but i saw something in information section, "The overnight bus cannot be reserved consecutively" and I don't quite understand its meaning.

For example, I want to buy Japan Bus Pass (4days). my routes are given below.

March 25nd (1st day) : overnight bus from tokyo to kyoto (one route)
March 27th (2nd day) : overnight bus from kyoto to hiroshima (one route)
March 28th (3rd day) : overnight bus from hiroshima to osaka (one route)
March 29th (4th day) : overnight bus from osaka to hakata (one route)

does it mean "reserved consecutively" ? I'm very confused because someone told me it's not a problem so you can reserve any 2 routes maximum per day regardless of night/day bus. while others told me I can't do that because It's consecutive days.

I've e-mailed this bus company twice but there is no answers from them.

Has anyone ever make a reservation similar to mine?

Thanks in advance

"The overnight bus cannot be reserved consecutively" and I don't quite understand its meaning.

I think it means that you cannot make a round trip within a single day. Your particular itinerary should pose no problems.