Pen starts down / Odd servo behavior

I've pieced together an Eggbot from various electronics I already had (Arduino Mega 2560 / Ramps 1.4) and everything seems to work well apart from the start.

The pen lowers to the egg, then travels to the starting position before beginning to print. This leaves a straight line from the home position to the start (see this link for an example: https://imgur.com/a/BU3vS). After that, everything prints fine. I'm unsure if this problem is due to my electronics setup or my software setup.

Any thoughts?

Software:
- Windows 10
- Inkscape 0.91
- Eggbot Extension 2.7.1

Hardware:
- Arduino Mega 2560
- Ramps 1.4
- SG90 Servo
- 17HS19-2004S Steppers