Bests & Worsts Reviews from Amazon

I've never reviewed anything online before, but I had to get back on Amazon and review this collar. I read all the positive reviews of this collar before buying it, and felt fairly confident that I'd done my homework on it. I realize now I should have read some of the one-star reviews. What happened: We followed all instructions, put the collars on our two dogs (a English Springer Spaniel, and a Jack Russell Terrier), as tightly as recommended, and without other collars to interfere, and then observed. First thing to happen: the Springer shook his head to get used to the collar. The vibration, or maybe the noise of his ears flopping, set off the collar and it sprayed him in the face. Second thing to happen: the Jack Russell licked her paws, and made a swallowing noise, which set off the collar, and sprayed her in the face. The Springer then did bark at someone on the road, and the collar sprayed him, which was good, but the citronella made him sneeze, and each sneeze elicited another spray from the collar, in an endless loop: sneeze, spray, sneeze, spray, sneeze, spray. I finally took the collars off both dogs, and planned to return them. Before returning them, I called the manufacturer and explained the problems I was having with the collars, to see if there was something I was doing wrong. The woman I talked to verified I had the latest model of the collar (I do) and then said she didn't have any troubleshooting tips, and recommended I return the collar. I just went to return the collar, and Amazon will not accept it, since it is a "hazardous or flammable material." I haven't yet resolved this, but plan on trying to call and talk to an actual person at Amazon.com to see if I can get a refund of any kind.