Same here. Front go on easy. Had to use old screws on rear. Very cheap, but look good.
I also had to use my original screws for the rear chrome trim, I even went back and got another set of screws from another package, only to find they didn't fit either. Now I see you and ghost had the same problem, then there is definitely a problem with them. I looked at them over and over again, they look the same, the parts person said they were the same and I am sure he thought I was crazy trying to scam him out of a set of screws. I ended up removing the eight inserts and re-threading them with the new screws, by screwing them in and out a little more each time. It took 10 or 15 minutes, but they work now.
I have the instrument trim chrome also, I'm not sure that it's worth what I paid for it because I bought the kit that has the dash insert also. I couldn't find the other chrome pieces without the insert, so I had to pay at least double the amount, but when I want something, I'm crazy, dang it, the parts guy was right.