Captain Hydra / Captain America "Hail Hydra" Edits - He's still betraying you

Hale Saxton.

Which is actually plausible;

Disguising yourself as a spy will assign you a random "disguise" to complete the illusion.

So if you're the only spy on your team, and you disguise yourself as an enemy spy, it's entirely possible for your disguise's "pseudo-costume" to be you!