The subjects are planned to be administered amnestics on 01/01/2016.
Planned is unnecessary. are to be administered… already gives us the full context of whats going to happen to them.
This list also provides mentions phenomena that happen to the subject’s bodies when they are in RPC-027-B.
provides is unnecessary.
command and returning the group back into our reality. The two Authority agents were able to apprehend the three police and took them to Site-███ to be administered amnestics. RPC-027 was taken to Site-016 for testing.
If it's happening in the past and the Authority logged it, then it should be "returned" the group…
"The two…" Is unnecessary. Your entire article has a lot of "The" and "This" to start sentences. If you retracted it to "Authority agents…" the reader already gets who apprehended them without needing to know how many agents there were.
Minor nitpick… is Site-███ necessary? Like what does the reader gain by there being a "spooky" unknown site we don't know about for interrogation or detainment? You could just replace this with Site-016 and it would have the same effect upon a casual read.
Overall I don't necessarily understand the pivot from the second-to-last log where the D-class assassinated Abraham Lincoln to the last log where they actually have real-world, long-term effects.
A lot of Spelling and Grammar errors sort of ruined my enjoyment of what was otherwise a solid little item that does a thing. Novote atm.