I own a Snow Leopard, which requires an update; namely, the SMC V1.5. I saved it and installed also. During installation there was no problem. When I tried to run it, it showed I had one update left to install. According to it, I downloaded the update and installed it again. After that no updates were left, but in the menu of downloaded updates it was showing something unusual. For example, it was showing the Thunderbolt update 1.3 on the list four times. Is this because of a mistake made by me or is this some other problem with the system itself? Can anyone please help me with this?