Kaweco sport problem?

Hey, I got my first kaweco sport, it's an AL little witch edition. The body keeps on unscrewing from the front all the time when I uncap the pen. I screw it back in, no biggie. My biggest problem is that the nib feels loose. It rocks back ans forth when I write...like the whole nib. Is it normal?

Hey, I got my first kaweco sport, it's an AL little witch edition. The body keeps on unscrewing from the front all the time when I uncap the pen. I screw it back in, no biggie. My biggest problem is that the nib feels loose. It rocks back ans forth when I write...like the whole nib. Is it normal?