Why did the UK's first satellite end up thousands of miles from where it should have been?

Someone moved the UK's oldest satellite and there appears to be no record of exactly who, when or why. Launched in 1969, just a few months after humans first set foot on the Moon, Skynet-1A was put high above Africa's east coast to relay communications for British forces. When the spacecraft ceased working a few years later, gravity might have been expected to pull it even further to the east, out over the Indian Ocean. But today, curiously, Skynet-1A is actually half a planet away, in a position 22,369 miles (36,000km) above the Americas. More

(Source: - Nov 9)