using /clone on minecart tracks does not preserve orientation

Is green for the original tracks and orange for the cloned tracks?

Confirmed.

Yes green is original
orange is cloned

Maybe this affects also normal 1.8.

Probably I haven't tried but if it does ill add it later

confirmed for 1.8 and 1.8.2 pre 1

Probably Minecraft checks everytime when a rail is placed if there are other rails near to connect to them. So it could be difficult to fix this because maybe other player want this behavior. But I guess it is still a bug.

It clones other blocks with correct data values. But I suppose if each rail is placed a fraction of a second apart it would act like that. I guess /clone and /fill place blocks along the X axis and then moves to the next row along the Z axis.

behaves same way when using /fill regardless of data value provided (/fill ~ ~ ~ ~9 ~ ~9 minecraft:rail 0,1,2,3,etc. all make same loop pattern)

this is resolved as duplicte, no need to update the affected versions

This is resolved as duplicate, no need to update the report (second time)