These are elements that infected these species after they split. And they are not found in any kind of coherent pattern. This paper simply reports that they are present in these species.
As far as the *same* element, it is never the *same* and if you don;t understand that you do not understand molecular evolutionary biology.
Sure they are.
However, at least five different examples of nearly identical retroviral sequences embedded at the same position in human and chimpanzee DNA have been reported (Bonner et al. PNAS 79:4709, 1982; Dangel et al. Immunogenetics 42:41, 1995; Svensson et al Immunogenetics 41:74,1995; Medstrand & Mager J Virol 72:9782, 1998; Barbulescu et al. Curr Biol 9:861, 1999),
Of course they may have accumulated some mutations, but clearly these ERVs cited in those examples diverged from a single sequence. And their location is the most telling.
Here, ? These are elements that infected these species after they split.
If germ line infection is this common -- which it seems to be -- seeing or not seeing comonalities in organisms sharing common descent is not as important as stressed by the evangelists at to.
This is the genomic era and old fears and prejudices and defensive tracts such as those at to are even more passe than ever.