Passing Runners on Home Run

 
With one out and the bases loaded, the batter (B1) hits an over-the-fence grand slam. The runner at first base (R1) ran only about 10 feet from the first base bag and stopped to admire the home run -- and in doing so, B1 rounded first base and briefly ran a couple steps past R1.
 
The B1 and R1 quickly sort things out and then ran the rest of the way around the bases in the proper order. What actions do the umpires need to take?

Extra tricky question: How many runs score if the play above began with two outs?
 
Call
When a runner passes another unobstructed runner, the runner is immediately out (NF 8-4-2m).
 
In the play below, B1 passed R1, so B1 is immediately out (for the second out of the inning). B1's score does not count, but the other three runs do count.
 
If there were two outs when B1 hit his over-the-fence homerun, when B1 passes R1, he is immediately out (for the third out). However, in NF (and only in NF), the over-the-fence homerun is considered a 4-base dead ball award (versus a timing play) and the three other runs still count.