I had similar experience in the past.
The main reason for me was wrong Assets file.
(resulting in wrong position sizing).

Be very careful with it.
Double check which assets file you are using (the one defined in accounts.csv, AssetsZ2.csv or other)
Double check/compare your Assets file with /log/Assets.csv (where you have the most for your broker figures). If different transfer the rows from assets.csv to your assets file.

Cheers
Anton