1. Was the mag loaded? If yes, I am not sure. If no, that is a function of the Kahr, its alot harder to use the slide release on an empty mag.
2.a. I assume this is manually racking the slide not shooting? Manually you must make sure you are pulling the slide as far aback as possible before releasing for the best results.
2.b. JHPs or Ball? Either way, this will probably clear up during the break-in. The feed ramp is probably a lil rough, you may want to look at it closely. I would shoot the recommended 200, if you stil have the problem contact Kahr, they may need to polish the ramp.
These guns are extremely small for their caliber (look at any other gun of the same cailber) and come from the factory relatively tight. The 200 round break-in is to loosen the gun up a bit and get the parts married a little more.
I wouldnt worry til after at least 200 rounds. Even then, I would put one more box thru before contacting Kahr.