I order from them last month. No problems. Took 5 days to arrive from west coast to northern Illinois. Dynasty Genetics had them listed as a vendor, and that was good enough for me.
Out of 6 Candy Punch plants, I ended up with 4 females, 1 male and 1 that wasn't keeping up with it's siblings. They went through 2 extended periods of forced slow growth, and bounced right back both times. I didn't plan on stressing them like that, but I was kinda forced to.
Stats: straight...
I'm in Illinois, also. I've ordered several times from both JBCseeds https://www.jbcseeds.com and Great Lakes Genetics https://www.greatlakesgenetics.com. JBC ships fast, and has a 10% coupon code for RIU members (it's RIU10). GLG (Great Lakes Genetic) takes a little longer, but probably has...
I've used it more than once.
I just tried it. It works for me. When you view the cart, the discount is shown in the Cart Totals section, not the Product section.
If it's still not working for you, I would clear your browsers cache, and try again.