My guess is that the spectrum chart triggered some spam protection, honestly. I would call customer service but Amazon's customer service can't do anything other than send you another copy of the item you're complaining about.
(That's my other Amazon story. One time, I bought some bicycle tires on Amazon. They sent me the wrong model, mountain bike size instead of road bike size. I wrote them a detailed email describing what they sent me and what they should have sent. "We're so sorry!". The next day, two identically wrong tires arrived. I complained and they refunded my money. I now had to find a way to use four mountain bike tires, and I still had no road bike tires. 2 riding days lost. An hour writing emails lost. And I still had no bike tires. I bet 99% of people would call that "great customer service". I think it's terrible. (Amazon did eventually remove the listing in question, so that's nice.))
