they will keep getting "confused" by older-than-expected objects because the premise is wrong to begin with: the universe is not 13 billion years old, the universe is infinite and eternal.
That means there are an infinite number of exact copies of you typing on HN and on an infinite variety of HN analogues in their respective timelines. Infinity is big!
Most people don’t realize that, unless the universe has positive curvature, it’s infinite in extent according to the usual General Relativity cosmology. We have no evidence that the universe is anything but flat.