In my qweb report there is one issue when i give the <th> value and 

<thead style="background-color:lightGrey;" t-foreach="get_account_lines" t-as="bal"> <t t-if="bal.get('account_type') == 'sum' and bal.get('level') >= 0"> <th class="text-left" style="width:0%;height: " t-esc=" 'Balance' "/> <th class="text-left" t-esc="bal.get('balance')"/> <th class="text-left" style="width:0%;height: 100%; " t-esc=" 'Balance' if ( data['head_invisible'] ) == False else 'Net PL' "/> <th class="text-right" t-esc="bal.get('balance')"/> </t> </thead>

value is greater than 0 table will be come in two times  like balance table , how solve this urgent