Half drop repeat not working as defined pattern?

[Jordyn5C2F]

I am trying to make a repeat pattern by first creating all of my objects on individual layers, converting each one to a smart object, then placing a few elements off of the canvas. I am CMD-C then Shift-CMD-V each object on the x-axis and using the properites panel to move it down the full length of my canvas. 

Now I do the same thing for the Y-axis. Paste in place, move to the right full width of canvas, then up HALF the length. 

I am able to use Pattern Preview and everything looks seamless, but when I Edit-Define Pattern and test my pattern on another, larger canvas, all of my elements touching the edges are off. Most notably, the Y-axis but even the X-axis elements are just slightly off.

Does anyone know of a solution? Thanks!

[Jordyn5C2F]

The first photo is my pattern/tile and the second is what my tile looks like after Edit-Define pattern.

[Bojan Živković]

Can you capture screenshot in View > Pattern Preview mode?

[c.pfaffenbichler]

I am trying to make a repeat pattern by first creating all of my objects on individual layers, converting each one to a smart object,

Why? 

Wouldn’t it make more sense to use multiple instances of the same Smart Object? 

[c.pfaffenbichler]

»Now I do the same thing for the Y-axis. Paste in place, move to the right full width of canvas, then up HALF the length.«

What is the half-height-offset supposed to achieve? 

A side-note: Instead of duplicating the Layer one could use the Smart Filter Offset (with the pixel wdith of the document) set to »Darken«.