Multilevel indexing with .to_latex() method merges two index columns
The to_latex method produces wrong latex code for multi-indexed funds.   looks like it are missing a few blank {} and &.   Net result is that the current method merges the two indeces.    when used with output from pivot_table with major index giving categories and other one details this produces totally garbled results.

The formatters= parameter of to_latex method also creates exceptions for multi-indexed data
