If you look at the second example, it's clear. The "official " time of the post from Mjollren is 1701. I suspect that there is an initial delivery (somehow) and then the server re-orders the posts by the "actual" receipt time. I suspect that the actual gap between the posts of Zehrix and Mjollren is more like 500msec.
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Remembering Tyneetryk
Phaedreas Tears - 15 years old and first(*) of true neutral guilds in Atys.
(*) This statement is contested, but we are certainly the longest lasting.
<clowns | me & you | jokers>