Runner Interference on IFF Rule

[jicecone]

OBR 7.08b, commentary

"A runner who is adjudged to have hindered a fielder who is attempting to make a play on a batted ball is out whether it was intentional or not."

" If, the umpire declares the hindrance intentional, the following penalty shall apply: With less than two out, the umpire shall declare both the runner and batter out. With two out, the umpire shall declare the batter out"

This is also covered under 7.09g "Interference by a runner".

Did anyone ask the officials why they made the ruling they did? Mabey they didn't see the interference and in that case the batter would be out. Why the runner was returned?

Interference would take precedence over the IFF. However it seems like the two rules were mixed together and the outcome was what you ended up with.

The above seems to imply that if the interference was non-intentional, then R1 would be out and B1 on first.