Looking good. The last picture is a root

. I find that that it's helpful to guide the spike when it is still young and flexible. I also find that adding the stake reminds me to be careful of the emerging spike and not break it off! Initially the stake will be longer than the spike....
For me, I usually use a 6"-8" stake so that when all is done, the inflorescence will arch. That's just my preference. I don't worry too much about the roots when placing the stake, though obviously I don't try to pierce any roots either.
Good luck & Congratulations on the r-ebloom!