This is gross......

Sorry in advance for the long post, silly iPad... I love WEN and hope no one thinks I am being a WEN troll but.....for about 10-14 days I have had a lot of scalp irritation and was trying to figure out the cause. I have A LOT of sensitivities to ingredients so any new product is questionable. (I had recently bought a new scent of laundry soap by accident ) and sometimes I develop new sensitivities to products I have used for ages so it can take time to figure out the culprit. I use WEN kids due to a sensitivity to menthol. I bought my first gallon this year! Yesterday I noticed the color of my WEN seemed different so I opened the bottle and took a peek inside. Oh horror!! There was MOLD growing inside! It was growing down one side of the bottle and a large circle of darker mold floating on the top! Well that explains my scalp issues, I have been cleansing with mold. I had to let that one sink in for a bit. GROSS! Luckily I had a bottle of Clear shampoo I had purchased this summer when I was expecting house guests and washed my hair and scalp, repeating about 6 times. Then I got to thinking, what is the shelf life? I know I've had bottles in my stash for over a year with no problems, so I called customer service to ask ( I have the gallon on AD so I wasn't sure I wanted to get the December shipment). I wish I had gotten the reps name because she was so nice. She looked up the shelf life and it is two years and offered to exchange my gallon and to mark it as defective so I will not be charged return shipping. I was definitely not expecting that! I read the forums regularly and have never seen reports of mold before, and yes I keep the bottle out of the shower stream. So, a gross story and great customer service. Has this happened to anyone else?