Ionic checkbox and button interaction in io-item

Hi there, I’m having the following issue which is weird for me, note that I am a beginner in Ionic :sweat_smile:
Here is my code
http://codepen.io/anon/pen/rVoVmG
What I need is for each chevron button on the right to align vertically to the center and preferably also resize to mobile-appropriate. In the codepen example the buttons are even overlaying each other which is weird, but the output I get in my app looks as follows:
image

Any idea on what I might be doing wrong?