Isn't That a Paradox?

S3, E9: When the Blink Drive self-initiates, it transports the Raza and it’s crew nearly six-hundred years into the past. With no other recorded civilizations in existence, the crew decides to go to Earth to resupply. Once in Earth’s orbit, however, the Android detects a subspace signal identical to that of the Blink Drive emanating from a small town in Wisconsin. In order to investigate, the crew secures aliases and moves into a modern suburban home. Meanwhile, their appearance in town draws the attention of a group of neighborhood kids.