EX Manager Trainz industry track limitation

I notice that EX Manager trainz work's with no bugs with 433 industries installed. Anything above 433 you start seeing the famous red bug on load up.
It also has a limit on the products before the red bug, but like Shane stated, it's a game limitation, as I have see the same bug when using the "Load With" command.

Is that Industries or commodities? problem I had was with industries or trackmarks the drop window listing would nt show them all after so many hundreds are added....? Now commodities I found to many causes a lot of lag and game freeze?