Some of the language in this article is a bit odd, and appears to reflect a fundamental misunderstanding of satellites and orbital mechanics. The orbits of spy satellites are hardly "irregular", nor can they "shift direction often". Orbits are exactly regular, by definition. Orbital parameter changes do happen but are rare. Even the largest spy satellites have only very limited ΔV capability. And there are no stealth satellites: it's impossible to hide any large object in orbit. Amateur astronomers have identified the orbital parameters of all spy satellites.

The secret part about spy satellites is not their location but rather their payload. I suspect the reason the government wants to censor images is that a high-resolution picture could allow an adversary to infer a lot about payloads including imaging resolution, communications frequencies, power budget, and possibly even defensive systems.