For the '1 column per week and 1 row per customer' you can do this too, but it'll be a little painful and not great (at least, in the way that I am thinking of)
Basically you can change your breakdown to be by User -> Email or User -> ID etc (any unique property on a user essentially that is meaningful to you), and that will give you one row per user. For one column per week though, you'd need to duplicate your metric and timebox it to each week eg https://mixpanel.com/s/1vztoh which might be alright for you, but it won't give you the time ranges AFAIK. Someone else might have a better suggestion than that though, it's just the only thing I could think of to do one column per week.
