Indeed. As quoted from the post:
Hey guys,
Just a friendly reminder please measure around BOTH legs if you want BOTH legs to fit into your shiny new mermaid tail. We are not responsible for incorrect measurements. We can only make tails to the measurements YOU provide us
You laugh, but it happens :p
Also, Raven let me know they're changing internet providers because they've been recently having loads of issues. She's managing a lot of the online stuff right now from her phone instead until everything gets sorted out this week. So you may not get a prompt reply from her etc until it's sorted out. It took her a day to send me a message because it wouldn't go through!