March of the Multitudes has a confusing extra prompt

March of the Multitudes has up to two prompts. The first only appears when the stored mana is less than full, and shows the amount of stored mana. The second is labeled "Spawn Token".

I'm not sure why the second prompt is there. Other token summoning spells, such as "Stir the Sands", do not have a "Spawn Token" prompt.

The second prompt has caused my trouble in two ways:
  • Before I realized there were two prompts, I was wondering why the prompt didn't show me the stored mana, and selected "Not Now" in order to check the stored mana (hidden behind the prompt).
  • By making me expect a prompt even when I believe I have full mana, it has caused me to accidentally cast the spell without full mana.
I also suspect it interacts poorly with the "Replace Creature" prompt, but I haven't tried that lately.