Cargo shuttle moving from their parent factories and clogging suply lines

[KronusQc]

I have setup a production chain to pruce the material to craft  launcher turrets.  My most used factories,(solar power plant, steel factory) keep filling up with shuttles from other factories wich are not returning to their owners. This has the effect of stalling  suplies runs leaving from them and disrupting the entire production process. I do not think this is intended to happen. Shuttle run should go deliver stuff then go home, or  fetch stuff and go home or even better deliver stuff , fetch stuff once empty then go home. Not go fetch stuff and park in the other factory bay untill kicked out mannualy.