The first things I thought of (when reading the title) are that sometimes it takes a while to update the minutes from them being entered or lately they go to all zeros when the month changes until a few days in or once you enter exercise that month (like even the "this year" shows zero).
Also, (and this affects SparkPoints, not total minutes) you can only get points for up to 2 hours of cardio...but that wouldn't affect the minutes on SparkAmerica.
Glad you figured it out, though...sometimes we do silly things and it's all okay.
(aka Mommy_T) Central US
Zahari Skyhorn, Elite Ranger Half-Elf, Corinthium
Happiness is a butterfly, which when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you. ~Nathaniel Hawthorne
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