Hello,
When one selects 90 days in the first column of the plans' selector/calculator, all options in all other columns are automatically priced for 90 days of service. Equally, all discounts are automatically adjusted to reflect 90 days of discounts.
In light of the above, when you were charged $195, it was for 90, not 30, days.
The calculator did what it was supposed to do, namely, determine the cost of your plan from start to finish, based on the length of plan selected.
I hope that this has answered your question.