Usually I record 1080p at 30fps. Today I wanted to try the 1080i at 60fps. I set the dial to that setting, recorded some footage, but after I pulled the files off the card, it off it shows the video is still at 30fps. 720p at 60fps works fine, shows up as 60. Is this something to do with the "i" in 1080i ? Any help is appreciated, thanks!