Your complex profile has the 2 painted stripes, but as far a s the rail tool is concerned - it is just one railing, so shows as that in plan.
You could try using a rail (or top rail) and a separate handrail in the railing tool.
Adjust their heights and the offset of the hand rail accordingly.
These will show separately in plan.
Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11