A price on any page, including ours, can be out of date.
The page itself says to confirm current terms at checkout, and it carries conflicting reference prices. We do not run the checkout, so the figure shown there is the one that counts.
Shipping on the 2-bottle package and tax are the lines most likely to change the total.
Read the order summary line by line: package, price, shipping, tax, total. Screenshot it. Compare it with your confirmation email and then your card statement. If any number differs from what you expected, ask before paying.