First of all i love your mod.
I have created some provider stotion with mutiple items, and it works ''almost without error'' but some times when a item is requested to the same station will generate an order in the same train that exeed the total space in that train . therfore the train will wait till x ammont of items but the inventory is full.

sorry if i write something wrong or it can't be understood , english is not my native languaje.

have a nice day. Edison_EF

Can you describe what inputs your station are receiving when the bad order is generated?

So something like:
requester station input: {iron-plate=-1010, copper-plate=-1050, request-threshold=1000},
provider station input: {iron-plate=2000, copper-plate=1200, locked-slots=1},
generated order: {iron-plate=1010, copper-plate=1050}

for example

request stations and provide station, enough materials
generated order: {iron-plate=4000, copper-plate=4000, stone= 4000, sand =8000}
the problem is that the train fills up, (with 1 order will work good but tryes to generate 4 at the same train) the problem is that the train in this case is 120 slots and the cargo is something like 180 slots

I cannot reproduce this issue. I have a 1:3 train, I created stations with those items, and it correctly truncates the order to {iron-plate=4000, copper-plate=4000, stone= 4000}, which does fit in the train.

Could you perhaps send blueprints or a world download? I'm not sure how to track down this issue otherwise.