Spiralize Mode Default Settings?

[psnoddens 0]

I am using Cura 15.04.2 with my Ender 3 printer. I accidentally printed a spiralized spaceship at the wrong settings for my machine

- normally set at 0.4 nozzle, 1.75 diameter filament and shell thickness of 0.8 mm.

I started my print and a few minutes later went back into Cura to check on the maximum height of the model and noticed that the settings were set at:

0.5 nozzle, 2.75mm diameter filament and a shell thickness 0f 1.0 mm

Since it was printing ok, I decided to leave it alone and see what happened. To my surprise the spaceship printed great! I decided to print another one at the correct settings for my machine to see what happened. It printed ok as well, however the thickness of the wings and the overall thickness of the model was thicker than the one printed at the 0.5 nozzle settings described above!?? How is this possible?

I printed a third one at the 0.5 nozzle settings and as before the wings and overall thickness of the model is thinner than the 0.4 nozzle settings???

I have attached a couple of pictures - the one with the bit of filament at the tip is printed at the 0.4 nozzle setings...