I have had issues when I leave the window open overnight (“sleep on it”) before making the final click. One time (Panda Security) it seems the sale was over so they charged the regular price. Another was an eyeglass site, it seems the deal on free tinting for prescription glasses was over, so I got clear glass, even though my receipt said tinted.
Both made good on it (long hassel with Panda) and I got to keep the clear glasses.
