Huh? I don't understand that question at all.
I am saying only one shoe stepped in blood. Since there's a right "Foot print" in the bathroom, and a left shoe print appears to be moving in a struggle pattern on MK's pillow case, I'm saying he must have lost a shoe in the struggle and got blood on his right foot at some point. That's the footprint on the bathroom rug. he cleaned that off his foot and put his right shoe back on, which would not have blood on the bottom of it, because it flew off in the struggle. Maybe he even had a bloody sock as a result. I don't know.
For me, that theory (guess) explains why there's just one shoe mark making 6 patterns on that pillow. It was a left shoe. Then it was a right foot print on the bathmat.
Now I don't know how he got the blood on the right foot. I don't know how he got to the bathroom with it on his foot. Have no idea. Just pointing out that one shoe, the left shoe was making blood prints in the murder room, one barefoot print, a right one, made a print in the bathroom. By the time he cleaned himself up, it's possible that the one shoe with blood on it walked out the door along side the other shoe, which had NO blood on the bottom.
I'm saying that if we can't see both shoe prints in blood, then we can't know for certain what position the right foot was in when he left the room.
These observations I'm making really don't have anything to do with AK and RS. Only RG.
Make what you want of my suppositions, but his right shoe apparently didn't track blood out of the house, if they conclusively identified his left shoe on the pillow case.