Board Thread:Questions and Answers/@comment-28265951-20160421125919/@comment-4919294-20160525050638

Time Remnant is just traveling back in time and being in the same time period as your former self.

Like when Flash traveled back to meet Eobard Thawne (as Wells) to get Tachyon device formula. Also, when Time Wraiths will hunt Time Remnants as is is a Paradox to have 2 Zoom/Flash in same Time/Space.