Thanks for the reply, sadly locked slots defeat the purpose for having ammo in the line. seems having a dedicated train for the ammo is the only solution.

Thankfully I found the issue, after stepping back and pondering. It would seem since my trains had an armored ammo car attached. Even though I had the threshold set to a specific number, the trains were counting my armored cargo wagon with ammo as extra space to fill... Might someone who what settin...

https://drive.google.com/file/d/187Lv-A ... sp=sharing

Enabled log file LTN option, but can't locate log file.
picture has most details.