HELP with the Blend Tool (I think)...?

Relatively new Corel user here...  Forgive me if my descriptors are not spot-on.

The two examples are the same object, with the one on the right modified.

The little boxes represent a 1" long LED light, and the line between them is the 4" connecting wire to the next light.

I would like to be able to draw a line and have the LED light (and associated 4" pigtail) "applied" along the path, with an additional LED light and pigtail added every time an additional 5" is added to the length of the line.  Two problems.......

When the middle RED node is moved, additional LEDs are added along the path of the line.  This IS exactly what I want.  The problem is, although none of the other nodes have been moved - the quantity of LEDs is reduced along the entire path...!  WHY...???

Please.......  Freakin' HELP...!!!!!!