Hello Swaaye,
a desync means that 2 players have the same mod BUT different mod versions or different files inside the mod.
from your log i can see that the file-validator that i added to Total mayhem failed:
info: Total Mayhem: [siminit.lua, line:2375] - Running from: @c:\programdata\faforever\gamedata\lua.nx2\lua\siminit.lua.
info: Total Mayhem: [siminit.lua, line:2376] - Checking directory /mods/ for TotalMayhem...
info: Total Mayhem: [siminit.lua, line:2384] - Found directory: /mods/totalmayhem/mod_info.lua.
info: Total Mayhem: [siminit.lua, line:2384] - Found directory: /mods/totalmayhemlite/mod_info.lua.
info: Total Mayhem: [siminit.lua, line:2391] - Check FAILED! Found 2 TotalMayhem directories.
info: Total Mayhem: [siminit.lua, line:2393] - Checking files and filesize for TotalMayhem...
info: Total Mayhem: [siminit.lua, line:2418] - Check OK! files: 2375, bytecount: 748982656.
Check FAILED! Found 2 TotalMayhem directories.
Please clear all modfolders from old mod versions (there can be 2-4 modfolders)
Be sure every mod has only 1 version installed and try again.
[Edit]
debug: uid="62e2j64a-TOMA-3652-01360-146as555a8u3",
The game is loading Total Mayhem V136, please update to V137 (from the first post)