Not to worry, everything is working as intended, the lore idea of Fluroflux is you are lacing bioflux with the fluroscent enzymes of the Stingfrond plant, which slowly metabolises the bioflux, creating a slow release nutrient. This is why Fluroflux is used as a nutrient, but has a much longer spoil time. However it also functions like bioflux in that if you want to quickly generate some raw nutrients from it you still can.
Bioflux has been unchanged in this mod, I have only added Fluroflux, an additional nutrient. I understand the confusion, as one comes from the other, and looks similar. However their purposes are quite different!