Yes, same thing happened to me. A few weeks ago I ordered a taper crimp die internal part (mine cracked) for my 44 spl/mag die set. I did the same as you and placed that part in the online cart. Just shipping charges, and a $0 cost for the part. I thought WTH and added a few other small parts to my order. Priming parts, parts that are easy to loose if dropped or misplaced, etc. Same deal with those. $0 , just pay shipping cost.
I almost felt bad about the low cost total, so I picked up their universal case flaring die too while I was at it. So far, works great for getting a more gradual flare for starting cast lead bullets into the case mouth.