I have an JOYE eGo. I just ordered my first cartomizer and drip tip. Filled it and all went well. I then went to put the drip tip on and it's loose. Not like what I am used to with the ordinary atomizer. There's like a rubber band around it and I'm assuming that goes into the cartomizer, but the band doesn't really stay in or under the end/lip. Is it supposed to be that wiggly? On the video I watched about filling, it looks like they just pop the tip on and go. But I am constantly readjusting it back in.