Oddity?

I've noticed something now on 40m and I am not sure if it is a radio oddity or mode oddity. When I qsy to 40m, in particular 7074 for FT8. I sometimes see transmissions on 7078 with the exact same timing as FT8. I know there are alternate freq to use if you are the rare DX and figure that might be what is afoot. When I change freq to 7078 then the transmissions seem to disappear. Other times some of the signals remain but do not decode.

Am I experiencing some weird ghost effect and it is an actual rig problem or am I missing something and it is some strange mode that uses FT8 timing that I am unaware of at this time.

For the record, Using a Flex 6600, 2.7.6 software, Win 10.