Hello - I put an item in my cart that was marked 50% off (great buy coupled with the 15% off coupon!) but when I checked out I noticed the price had changed to $16.95 and was no longer 50% off.  All within a blink's time and I didn't notice it in time to cancel.  The order is #112273845.  What happened?  Was this a glitch?  Thanks in advance!