@TerriStanley We 'collectors' are collecting something that is changeable, has different looks at different times of the year, has had a history of some mixed up plants, or incorrect labels, and are collecting something that most people are utilizing in a pot to add color or design - and don't care what it is called - they may or may not even know they're called sempervivum!! So it is an uphill battle!!
My attitude is that whenever I get something that I know is wrong - in this case it is your 'Pacific Rim' which has been ID'd as wrong because of the white/green bloom color, which is a strong identifier, once it blooms and you see they are the wrong color for the plant, it gives you the clue - maybe at the nursery they never bloomed?? So, I contact the nursery to let them know and have them check their stock, each nursery will listen or not - this isn't necessarily a rude thing, it is just that most of their customers don't care if a label is correct or not - if you let them know you are contacting them because you DO want correct plants, and you are a regular customer, I think you'll have a response. The nursery people want happy customers. And many of them do want correct plants!
For me I don't consider contacting the nursery for my money back, but so they don't continue sending out the incorrect plant. It sometimes takes many attempts at contacting them - there is one nursery that took me 2 years before they removed the plant from their inventory, so patience is good too!
