I followed the guide from https://wiki.openstreetmap.org/wiki/MapProxy to create a locale tile proxy for OpenStreetMap, because I need to access the same tiles over and over again. However, there seem to be some problems with the grid definitions.

As a example if I try to access http://localhost:8080/tms/1.0.0/osm/EPSG900913/6/12/11.png the URL is translated to http://c.tile.openstreetmap.org/7/12/116.png

What has to be changed in the config that mapproxy acts as a purely transparent proxy?