Your data export says what each payment was charged in
Membership/dues-history.csv in your data export now has charged_currency and charged_amount: what Stripe charged for each payment made on your website, in the currency it charged. A member whose auto-renewal is still in another currency is kept out of your books at 0.00 until you record it at your bank’s rate, and the file now shows what they paid instead of a free renewal. It also has the discount that came off the plan’s price, and the README says which currency every other amount is in. And when Reconcile refuses to mark a month because the difference moved, it writes the zero in your currency, not “$0.00”.