Question about a particular E-Juice vendor.

I received an order of juices from Kick Bass Vapor.

They began on an amazing level. Supremely spot on flavors. I'm used to Dekang as a juice normality. Tried this stuff and blew me away.

However, after about 1.5-2 weeks after receiving them, 2 of my flavors began to taste funky. My Cool Watermelon juice tasted like it got thrown in the wash (soapy). Sweetie Tarts tasted like sour vodka (alcohol-ish). Started off phenomenal, but became disgusting. Has anyone had this experience from their juice?

And does anyone of a great e-juice vendor with spot on flavors that don't change over time into a toxic sludge?