Coin Talk

Hi, today I found a blank penny, a 1985 canadian pointed 5, and these two coins with pictures. I was wondering about the semi plugged 9 in the date of the lincoln penny and the 6 I can see between the 1 and 9 ? it also looks like the plug is the top of another 9 or 1 when the coin is in the right light and angle. And on the canadian cent I was wondering if someone just cut this? Any input would be greatly appreciated.