Okay.
One, even if Piggo put 2 and 2 together and reasoned out that Taylor is most likely Kep, would she even write it down on a paper, even less leave it in a system that she is knows is compromised by half the gangs? I doubt she would even tell anyone about it. Even if we canon event this, the only (or at least the biggest) reason Director People-Hate-Me-Because-I-Didn't-Go-Along-With-Taylor's-Garbage went for Taylor's captur as a civvie was because he thought Dinah's predictions was a 100% thing, and Piggot have enough stuff on her plate to want to do something about Kep I would think.