i'm starting to think they didn't work out the start and end date right ie use a set date
as in the fact before x day of month = 90 but after that, on y day of the month, they = 30
but all stone's from before the change over date still count as 90 days
but any after count as 30 days
it seems to me now they just decided a date to cut off the stones and screwed it up as normal for qi :(
and cut everything to 30 days with no overlap/rundown of use by date from 90>30 days
as the amounts, i've needed to use over the last week are about 3 times the amount it should be
ie being forced to use up 3 days worth of old stones time (90) in 1 days worth of new stones time (30)