Buyer Beware: This Burger King BOGO Coupon Is Too Good to Be True

Burger King has recently come under fire for reportedly inflating Croissan'wich prices whenever a coupon is used. Now, a Maryland woman has filed a class action lawsuit against the restaurant chain to make it pay for what she says is a scam.
Buy 1, Buy Another
Koleta Anderson is the customer behind the suit, which was filed with the US District Court in Maryland. She alleges that Burger King is purposely increasing prices for its breakfast sandwiches whenever they're purchased with a "buy one, get one free" coupon.
Anderson first grew suspicious of the BOGO offer when she was charged $3.19 before tax for two sandwiches with the coupon. When she later bought a third Croissan'wich without a coupon, she was only charged $2.16. Anderson repeated the same series of purchases at a variety of locations in Virginia and the Washington D.C. area. The same thing happened.
Is Your Burger King Doing This, Too?
Anderson's lawyer hired a private investigator to check out a location in Florida for further proof the burger chain was up to no good. Sure enough, the investigator ran into the same pattern. And since then, the Miami Herald has also tested the BOGO coupons.
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Spoiler alert: Things are not looking good for Burger King. The paper saw the pre-tax price of a single Sausage Croissan'wich increase from $2.99 with no BOGO coupon to $3.19 with the coupon at two separate Florida locations. That's less than the change initially observed by Anderson, but it's still not "free."
Readers, what do you think of this case? Have you ever come across a shady coupon? Let us know in the comments below!

They'd get their food back and be issuing me a refund if they tried to change the price by a dollar or more! And their Yelp rating would get tanked.
The double sales tax actually makes sense in states that have it. The govt often gets its money before the coupon is applied.
This specifically happened to you at Burger King?