Why does the second spinner doesn't have margins/paddings

These are my string arrays that work just fine:

<string-array name="spinner1">
        <item>KB</item>
        <item>MB</item>
        <item>GB</item>
        <item>TB</item>
</string-array>
<string-array name="spinner2">
        <item>Kb/s</item>
        <item>Mb/s</item>
        <item>Gb/s</item>
        <item>Tb/s</item>
</string-array>

This is the XML:

<android.support.v7.widget.AppCompatSpinner
            android:spinnerMode="dropdown"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:id="@+id/spinner1"
            android:layout_weight="20"
            android:layout_gravity="center_vertical" />

<android.support.v7.widget.AppCompatSpinner
            android:spinnerMode="dropdown"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:id="@+id/spinner2"
            android:layout_weight="20"
            android:layout_gravity="center_vertical" />

This is how they look: spinner1 and spinner2

So far I can't find anything similar happening to someone else in other posts, wonder if any of you ran into this problem at all.

Here's what's in my MainActivity.java's OnCreate():

final Spinner spinner2 = (Spinner) findViewById(R.id.spinner2);
final Spinner spinner = (Spinner) findViewById(R.id.spinner1);
LoadSpin(spinner, spinner2);

Then outside of the OnCreate I have the LoadSpin() method:

public void LoadSpin(Spinner spin, Spinner spin2) {

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.spinner1, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin.setAdapter(adapter);

ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource(this,
R.array.spinner2, android.R.layout.simple_spinner_item); 
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin2.setAdapter(adapter2);
}