pivot_table not displaying values columns in expected order
#### Code Sample, a copy-pastable example if possible

```python
# Your code here
column_order = ['Year', 'Month', 'Currency', 'Total Net', 'Fees']
df_fills = df_fills.reindex_axis(column_order, axis = 1)

pd.pivot_table(df_fills, values = ['Total Net', 'Fees'], index = ['Year', 'Month'], 
               columns = ['Currency'], aggfunc = np.sum, margins = True, fill_value = 0)
```
#### Problem description
When creating the dataframe, Fees column comes first (it's from an external data set), while Total Net comes second (it's calculated). I reordered them using reindex_axis and when asking Python to show the dataframe, I get the expected order. However, when creating a pivot table, Fees always comes first, no matter what.

#### Expected Output
pivot_table should display columns of values in the order entered in the function.

#### Output of ``pd.show_versions()``

<details>
# Paste the output here pd.show_versions() here
INSTALLED VERSIONS
------------------
commit: None
python: 2.7.13.final.0
python-bits: 64
OS: Darwin
OS-release: 16.7.0
machine: x86_64
processor: i386
byteorder: little
LC_ALL: None
LANG: en_US.UTF-8
LOCALE: None.None

pandas: 0.20.2
pytest: 3.0.7
pip: 9.0.1
setuptools: 27.2.0
Cython: 0.25.2
numpy: 1.12.1
scipy: 0.19.0
xarray: None
IPython: 5.3.0
sphinx: 1.5.6
patsy: 0.4.1
dateutil: 2.6.0
pytz: 2017.2
blosc: None
bottleneck: 1.2.1
tables: 3.3.0
numexpr: 2.6.2
feather: None
matplotlib: 2.0.2
openpyxl: 2.4.7
xlrd: 1.0.0
xlwt: 1.2.0
xlsxwriter: 0.9.6
lxml: 3.7.3
bs4: 4.6.0
html5lib: 0.999
sqlalchemy: 1.1.9
pymysql: None
psycopg2: None
jinja2: 2.9.6
s3fs: None
pandas_gbq: None
pandas_datareader: None
</details>
