[St00ne]

I think this will answer your questions. Both are used in different cases.

Spoiler

L 10/19/2015 - 18:25:43: "Player1<432><[U:1:294123401]><>" entered the game
L 10/19/2015 - 18:25:43: rcon from "179.33.71.185:42258": command "status"
L 10/19/2015 - 18:25:43: rcon from "179.33.71.185:42258": command ""
L 10/19/2015 - 18:25:43: rcon from "179.33.71.185:42258": command "hlx_sm_psay "444,420,424,445,416,358,355,265,414,437,443, 438,341,415,439,447,411,258,434,396,419,330,3 82,612" 2 "Player1 (Pos 172 with 1405 points) has connected""

(...)

L 10/19/2015 - 18:25:47: "Player1<432><[U:1:294123401]><Unassigned>" joined team "CT"

(...)

L 10/19/2015 - 18:26:00: "Player1<432><[U:1:294123401]><CT>" killed "Player2<443><[U:10134563]><TERRORIST>" with "mac10"

L 10/19/2015 - 18:26:09: "Player1<432><STEAM_0:1:145678435><CT>" triggered "headshot"
L 10/19/2015 - 18:26:09: "Player1<432><[U:1:294123401]><CT>" killed "Player3<390><[U:1:190012345]><TERRORIST>" with "mac10" (headshot)
L 10/19/2015 - 18:26:27: "Player4<419><[U:1:44455734]><TERRORIST>" killed "Player1<432><[U:1:294123401]><CT>" with "mac10" (headshot)

L 10/19/2015 - 18:26:27: "Player1<432><STEAM_0:1:143554435><CT>" triggered "weaponstats" (weapon "mac10") (shots "103") (hits "13") (kills "3") (headshots "1") (tks "0") (damage "377") (deaths "1")
L 10/19/2015 - 18:26:27: "Player1<432><STEAM_0:1:143554435><CT>" triggered "weaponstats2" (weapon "mac10") (head "1") (chest "4") (stomach "4") (leftarm "1") (rightarm "0") (leftleg "1") (rightleg "2")

(I changed the numbers so the conversion between new and old steam id is not correct in this log).

On the web stats there are two profiles, one with an ID like STEAM_0:1:145678435 (I only see weapon accuracy and shots per kill on this page) and one like STEAM_0:[U:1:294123401] (Note the STEAM_0: in front of the [U:scheme]) which has a lot of correct stats.

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