I messaged them to ask if they got me confused with another Etsy seller. They said that they had to review the August order to complain about how I never shipped their previous order in July. 
That July order was delivered within 2 weeks. They left me a 5 star review on that order that said “Perfect! I love my package.”
That July order was delivered within 2 weeks. They left me a 5 star review on that order that said “Perfect! I love my package.” 