Hi Menion, the .gpx is attached in the post above 
I think a solution could be that Locus treats every "Geocache" within a .gpx of (for Locus) unknown type or unusual GPX-formating into an own pseudo-cachetype "Other". Icon of this Pseudo-caches could be e.g. a questionmark.
So all filter methods (distance, cachetype) could still be applied to them.

I think a solution could be that Locus treats every "Geocache" within a .gpx of (for Locus) unknown type or unusual GPX-formating into an own pseudo-cachetype "Other". Icon of this Pseudo-caches could be e.g. a questionmark.
So all filter methods (distance, cachetype) could still be applied to them.