conveyor belts not combining correctly inconsistent

[wrathyy]

Hello, I've just started playing factorio and after some time in game I have encountered this thing I'm not sure if it's a bug or not any ideas?
The second pic shows the problem of 2 rows of coal being made instead of 1 even the source is correct. blueprint from "Nilaus" working correctly for him in same version

[Loewchen]

You are not showing anything that suggests a problem with the game, a miner in range of a coal tile in your iron mine could easily cause this. If you want to know for sure, post the save.

[Serenity]

The build works just fine. Why do people always assume they are the ones having some bug with standard situations?

This could have happened when building the thing depending on how exactly you put it together. The splitter is side loading on the belts. There is absolutely no way for it to put anything on the far lane

[Pandrosos]

This could have happened when building the thing depending on how exactly you put it together.

Agreed. If you place the belts, then one splitter, then the other, then during the interval with only one splitter present it will load both sides of the output belts. And if that's not it, there's many other ways a belt can get contaminated.

[foamy]

This could have happened when building the thing depending on how exactly you put it together.

Agreed. If you place the belts, then one splitter, then the other, then during the interval with only one splitter present it will load both sides of the output belts. And if that's not it, there's many other ways a belt can get contaminated.

I strongly suspect this is the case, unless the coal has being continued to be sent to both sides (which is most likely due to some further kind of layout goof). I'd recommend the OP just manually pick up the excess coal via (F) and feed it into their furnaces, and then see what happens.