That is odd. I just went through the close/open, delete and move process with a moderator and it shows up on my modlog no problem.
What I might suggest is to get a clean version of the modlog and postings, then mod it using the different updates through the threads in here and try again.
One thing on the split+move update is the notice that the FROM is in the TO field ("toforumid"=>"$log[fromforumid]")
PHP Code:
case("6"):
$split[$log[timestamp]] = array("type"=>"6", "userid"=>"$log[userid]", "threadid"=>"$log[threadid]", "title"=>"$log[title]", "username"=>"$log[username]",
"toforumid"=>"$log[fromforumid]", "threadtitle"=>"$log[threadtitle]", "userid"=>"$log[userid]", "toforumid"=>"$log[fromforumid]");
break;
Josh