Guaranteed minimum higher than any point on average line

[Kemp-J]

Screenshot below. Is this expected or a bug? The guaranteed minimum is higher than any point on the average line, which doesn't make any sense to me.

[jeffgillean]

This makes sense because the lines fluctuate independently. Different patterns peak at different times, so even though the average value never goes that high, each individual line is guaranteed to peak at least as high as the guaranteed minimum.

This is an overly simple example, but imagine there are only two possible lines: one starts at 100 bells and smoothly decreases to 0 bells; the other starts at 0 bells and smoothly increases to 100 bells. The average is 50 bells every single day, but your guaranteed minimum is 100 because both lines are guaranteed to reach 100 bells at least once (in this case exactly once) before the end of the week.