K slow down tiger!
Just becasue they were doing a first step ritual does not mean they will continue to spawn. I know it sounds wired but thats how Corydoras are. Also they do like to follow each other around throughout the aquarium like that but the way you described it, it does sound like first stage spawning to me.
How big is the tank? Where they swimming over each strata of the aquarium? (top, middle, bottom) and how fast where they swimming when you observed the behavior?
Before you move any of your tankmates. do you have a 10 gallon or larger spare tank? if so you could very easily spawn those little guys in there with my and other people online help.
Btw to me the bronze one looks like the female and the albino looks like the male!
But i didn't observe the behavior! Good pic too!