In most episodes, the Decepticon symbol is drawn incorrectly. It has three "spikes" jutting out of its middle-upper section, when there should only be two. This is probably due to faulty animation models, and is thus a legitimate error. Only on a handful of occasions are the symbols drawn the right way. See more
Ah, my loyal Constructicons. You are loyal, aren't you? No! You're traitors! And you can't deny it!
Megatron, y-y-you've got it all wrong!
We're still working for you and for the glory of the Decepticons.
You see, we eavesdropped on their plans...
...plans to build a whopper solar tower...
...that would produce mega-watts of energy!
Energy we could use to destroy the Autobots! Get it, get it, huh?