The talk origin tract indicattes that repeat elements should always be seen in organisms with a common ancestor. In this case there are duplication events in common ancestors, but not human, The talk origin tract would make one think this contradicts common descent.
It doesn't take in to account there can be deletions such as observed whereby Gorilla, Chimp and Orangutan have elements in common, but not human.
As more genomes are sequences and analyzed there will be a lot of these sort of ostensible descrepancies.
Articles meant as evangelical polemic, such as cited here, and mindlessly parrotted here by some, present a false picture of molecular evolution's complexity.
"repeat elements should always be seen in organisms with a common ancestor"
Supply a referenced quote for this, please.