Filter group generates wrong SQL

my filters look like this

(
Node: Published or admin
AND Node: Type exposed
) AND (
Node: Type <> Calendar event
OR Date: Date (node) (Content: Date (field_date) - From date) Exposed Popup Day
)

this is the correct representation of what I specify. However, the generated SQL is this. Please scroll to the end and note the underlined part

SELECT node.nid AS nid, gmaps_content_point.vid AS gmaps_content_point_vid, gmaps_content_point.map_type AS gmaps_content_point_map_type, gmaps_content_point.latitude AS gmaps_content_point_latitude, gmaps_content_point.longitude AS gmaps_content_point_longitude, gmaps_content_point.elevation AS gmaps_content_point_elevation, gmaps_content_point.x AS gmaps_content_point_x, gmaps_content_point.y AS gmaps_content_point_y, gmaps_content_point.z AS gmaps_content_point_z, gmaps_content_point.privacy AS gmaps_content_point_privacy, gmaps_content_point.bounds AS gmaps_content_point_bounds, gmaps_content_point.pov AS gmaps_content_point_pov, gmaps_content_point.search AS gmaps_content_point_search, node.vid AS node_vid, node.uid AS node_uid, node.type AS node_type, node.title AS node_title, node.sticky AS node_sticky FROM node node LEFT JOIN content_field_date node_data_field_date ON node.vid = node_data_field_date.vid LEFT JOIN gmaps_content_point gmaps_content_point ON node.vid = gmaps_content_point.vid WHERE ((node.status <> 0 OR (node.uid = ***CURRENT_USER*** AND ***CURRENT_USER*** <> 0) OR ***ADMINISTER_NODES*** = 1) AND (node.type in ('calendar_event', 'profile', 'study_group'))) AND (node.type not in ('calendar_event')) AND (DATE_FORMAT(ADDTIME(node_data_field_date.field_date_value, SEC_TO_TIME(-28800)), '%Y-%m-%d') >= '2010-03-03')

the Node: Type <> Calendar event is not grouped with the the date condition and AND'ed instead of OR'ed.