Seeker had intended to alter the story of the Lost Primordial and paint the fact that all his allies were long-time enemies and were all plotting against each other.
The greatest advantage that Seeker and the Unlocked army had was that they improved their technology at such an insane amount of speed.
Seeker only had the technology of the Pangean Government at the start. But they quickly grew in power and tech in several months. This made it difficult for the Presiders to trace the very source of the Unlocked armies. They cannot believe that in a span of a few months, Earth would develop a means to gain the same power that can challenge these Presiders.
Seeker himself, who had just revealed a portion of his power, appeared to have technology that needed to be cultivated since World War 3. Not one of them, even the Top Tiers, assumed that the Progenitor and the ones masquerading as the Lost Primordial only grew to the level of Presiders in a few months.