bulk data doesn't convert to DataFrame correctly

[txu2014]

the following code fetch the UKX Index Members, the data frame return didn't convert the table correctly.
df.values[0][0] gives expected table.

import pandas as pd
import tia.bbg.datamgr as dm
mgr = dm.BbgDataManager()
mgr.sid_result_mode = 'frame'
ukx = mgr['UKX Index']
df=ukx.get_attributes('INDX_MEMBERS')