This week, Trade Log was only showing 1 leg of some trades for my MOC system, and not showing any trades for other stocks I was filled on. I got onto a tech guy at IB who stepped me through the following process to rectify the situation:
1) Close TWS
2) Go to This PC: C Drive: Jts/dcmhscxttj
3) Delete the trade logs for the last few days (e.g. for Tuesday’s trades I deleted the file TUE.trd)
4) reboot TWS and go to Trade Log. All should be OK