[EP 16] Toxic Spikes error?

[PedroHenrique 7]

So I was grinding Roserade by sweeping the Teenage Mutant Ninja Squirtles guy, and I was using toxic spikes in all of our battles, however, I've noticed they were less damaged when I put 2 layers of spikes than only one, apparently badly poison and poison damages could've been switched.

[ShadowStar 34]

Badly Poisoned (aka Toxic) deals less damage than ordinary Poison for the first few turns. However, Toxic Poison's damage grows exponentially when the same Pokemon stays on field while being Badly Poisoned.