Athleta review: "40%" discount if I opened an athleta/gap card

I went into the Gilbert, AZ store location to buy some salutation tights. The sales rep mentioned the discount if I'd get the card. She stated several times it's 40% off then commented and said it's double the discount for today since it's 20% and then another 20% on top of it.

I told her, that's false advertising because that's not 40% off. If you take $100 and 40% off, you'd pay $60. That same scenario at 20% with $100 is $80 and then 20% off is $64. Is it close? Absolutely - is it truly 40% off? No! It's 36% off...

She said ... that's the way management has us explain it. I said you might want to tell management that it's false advertising. She then cut me off and asked me if I wanted the item or not.

Because I LOVE these tights, of course I bought them. I did NOT open a credit card though. And when I came online to see how to email customer service about it, I found the comments about the lack thereof truly good customer service. And I'm glad I didn't get the card!