Questions about Pokeblocks and feeders in RSE?

Question

This Bulbapedia article mentions "single-color Pokeblocks", which I don't understand because I thought each Pokeblock has exactly one color. How can a Pokeblock not be single-color? Or is it supposed to say "single-flavor Pokeblocks"?

Also, the article says that if I use a feeder to encounter a Pokemon, and I throw a Pokeblock that's the same color as the one in the feeder, then the wild Pokemon might not be enthralled. How is this possible?

Comments

Because Red, Blue, and Green Pokeblocks were used as an example, and they each have only one flavor, I'd think that it was meant to say "single-flavor Pokeblocks".
As for your other question, where do you see that in the page?

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If it has a catch rate below 165, throw a Pokéblock with the **same color as the one in the feeder** (e.g., Red).
If the Pokémon **ignored** the Pokéblock, throw the third color Pokéblock (e.g., Green) (escape factor = 0), then throw Safari Balls.
If the Pokémon is **curious**, throw the same Pokéblock again (escape factor = 0), then throw Safari Balls.

Answer 1

The less-likely-wrong strategy:

Make three different colors of single-flavor Pokéblocks (e.g., Red, Blue, and Green). Put one into a feeder (e.g., Red) and start a wild encounter near that feeder.
When the battle starts...

>If the Pokémon's catch rate is higher than 200, throw Safari Balls;
Else, throw a Pokéblock with a taste different from the one in the feeder (e.g., Blue).
If the Pokémon is curious (escape factor = 0), throw Safari Balls.
If the Pokémon ignores the Pokéblock, throw a Pokéblock with the same color as the one in the feeder (e.g., Red).
If the Pokémon is enthralled (escape factor = 0), throw Safari Balls.
If the Pokémon is enthralled, then...
If it has a catch rate between 165 and 200, throw Safari Balls.
If it has a catch rate below 165, throw a Pokéblock with the third color (e.g., Green).
If the Pokémon ignored the Pokéblock, then throw Safari Balls.
If the Pokémon is curious, throw the same Pokéblock again (e.g., Green) (escape factor = 0), then throw Safari Balls.

source: asking here and here, not getting any answers for several months, and guessing it was most likely a mistake