60 Minutes

I don't understand my DVR.

There were 60 minutes clearly marked as open yesterday. I was taping a 60 minute show. When we got home from dinner, the show was taping so I didn't think anything of it. However, when I turned on the TV today, it said there wasn't enough free space. I looked at the list of taped shows and it had started the show late, at 4 minutes in.

Apparently, there wasn't enough room to tape 60 minutes (to replace the 60 minute show) but only 56.

I'm confused.

(If anyone's curious, the show was Standoff. I kind of wish that were sticking around).