Just going off of the *thumbnail* in the panel ... 

[![enter image description here][1]][1]

... it appears like the artwork is not complete or correctly configured. It is a bit difficult to tell based merely on the *thumbnail*.

The tile itself *should* have green parts where I've drawn red, and yellow parts where I've drawn blue. The pieces need to show the *entire* tile so when it repeats, it "fills in" parts which may be clipped on overlap sides.

[![enter image description here][2]][2]

And in order for "parts" to be repeated then need at least be a but inside the tile boundaries. And easy solution, for this art, is to make the green shape and compound path, and the yellow shape a compound path. Then place them correctly within a tile.


  [1]: https://i.sstatic.net/43t5J.png
  [2]: https://i.sstatic.net/XHvl8.png