Gahau,
I see you did get the CM9 Congrats!
This disassembly "issue" you describe is normal.
In fact, I always after removing the slide stop/pin, pull the slide back to it's normal firing position before pulling the trigger. It aligns the cocking cam correctly to the striker/striker safety plunger and IMO avoids potential "issues" and also any possible wear caused by pulling it out of alignment.
It also utilizes the recoil spring power to help "push" the slide off the frame smoothly.
This is just how I do it, so do what you want, but I have heard of and tried to help more then a few people who got their slide "stuck" when trying to disassemble their Kahr.
Kahr's are not like Glock's or XD's. They are like Kahr's and have some very important Kahr specific way's thing's need to be done. I suggest reading the manual closely to help avoid any future "issues"
Some stuff off the top of my head you should know:
The "chip" in the frame rail is normal.
Make sure the open end of the recoil spring is towards the muzzle.
When you re-install the slide pay close attention to the placement of the slide pin in the barrel lug, it must go in the kidney shaped hole not in front of it.
Use care to not bend the small spring when you insert the slide stop lever into the frame. Start at 4 o'clock then move it to 3 o'clock being careful the small spring goes on top of the landing and fits in the small groove.
Thes are just a few helpful hint's you need to know. You should go over to Kahrtalk and do some reading to get more info and learn about your new Kahr