I did contact GSA and spoke directly with a representative, she basically said exactly what you mentioned about Satin Ice not sealing the 2lb tubs...Still it doesn't make sense why they would not seal a 2lb and seal 5lb tubs.
That explanation is perfectly fine for me, I will use what was sent. However if I was aware that they were opened I would not have purchased them. Maybe there should be some disclaimer on the website. Just a thought, I can't imagine I would be the only customer bothered by the tub not being sealed.
Thank you for your prompt response, and in no way was I trying to undermine your customer service. In fact I think your service is great. I was merely looking to see how other business owners would handle that situation.