Simplest explanation is, it was Q without the trip or signature.
however, just thinking out loud here;
either those posts with the same ID were Q, or;
potentially Q's ip was cloned, or other method to intentionally gain same ID (as we see happen from time to time with anons on the same VPN)
>>5386040 was first, followed by the two without trip.
ID known, and hijacked?
Then next bread, Test 1 and 2 were first, and Q showed he could do the exact same thing with Test 3?
Idk if this is even possible. Probably, but idk for sure.