factory mark on timing chain

[jrc2905]

I am replacing the timing chains on my 2000 Altima due to a failure of the lower chain adjuster.
I have done Sentra timing chains before and I am familiar with the procedures.
I have both the factory and after market manuals for the Altima.
When I was able to see the lower chain timing mark on the crankshaft, There was a yellow link and right after that the next link had a paint mark on it.
The painted link was on the crankshaft timing mark and it looked as if the crankshaft mark also had some paint applied to it. I could tell that this engine has never been apart and this is how it came from the factory.
I have not received my timing chain rebuild kit yet so I do not know if there is any information contained it that.
I am thinking that the painted mark my be a result to the setting changing depending on the rotation of the engine.
With all the work involved in taking this engine apart I will not put it back together until I know what is up with this painted link.
Any help is appreciated and if anyone has the number of links between chain marks that would help too.