For anyone else, are you missing the map icons for Ring and Skirmish, and the mouse-over Tool Tip for skirmish?
Ancient Lakes is a simple map, Ring & Skirmish are lua scripts designed to be used in MP possibly once the Polynesia/DLC is active. The scripts might not be available for SP, thus No Icons here either. Unless Steam or Firaxis butchered a missing file (No changes in FPK nor additional DDS for the extra two) that was meant to trigger both for SP.
Weird - indeed.
PS; Yep, after verification - SelectMapType.lua wasn't "edited" to integrate the above. Nice tiny DDS pager for the browser though.
PS2; Never thought Ship Parts were FREE! Civilopedia got some edits in necessary places.