I'm sorry I did reply to this post and remember seeing the answer in the forum - I eventually found my reply in a completely different forum
That is strange - I'm looking into it.
If I search for 'Abrantes' - I get one match and then clicking reset I get nothing but if I manually reset the form it works.
In fact clicking reset from the initial screen then returns zero results.
So I converted the form from POST to GET and found the reset sends these parameters
?haselsfilter=109
&elsfilter[com_fields][nome-empresa]=
&elsfilter_com_fields_nome_empresa_matchtype=2
&elsfilter_com_fields_nome_empresa_matchrange=0
&elsfilter[com_fields][actividades][]=
&elsfilter_com_fields_actividades_matchtype=0
&elsfilter_com_fields_actividades_matchrange=0
&elsfilter[com_fields][localidade]=
&elsfilter_com_fields_localidade_matchtype=0
&elsfilter_com_fields_localidade_matchrange=0
&elsfilter[com_fields][paises][]=
&elsfilter_com_fields_paises_matchtype=0
&elsfilter_com_fields_paises_matchrange=0
&els_submit=
whereas the manual reset sends this
?haselsfilter=109
&elsfilter[com_fields][nome-empresa]=
&elsfilter_com_fields_nome_empresa_matchtype=2
&elsfilter_com_fields_nome_empresa_matchrange=0
&elsfilter_com_fields_actividades_matchtype=0
&elsfilter_com_fields_actividades_matchrange=0
&elsfilter[com_fields][localidade]=
&elsfilter_com_fields_localidade_matchtype=0
&elsfilter_com_fields_localidade_matchrange=0
&elsfilter_com_fields_paises_matchtype=0
&elsfilter_com_fields_paises_matchrange=0
&els_submit=
Now to find out whey they are subtly different