When I searched for Columbia, MD, there was a link at the top:
"Census Boundary Columbia, Howard County, Maryland, United States"
https://www.openstreetmap.org/relation/133606

Clicking on that link brought up a boundary definition (in orange) on the map for Columbia, which is incorrect.

It also says:

Relation: Columbia (133606)
Version #18
fixed boundary for Columbia, which still had admin level

Is that something you are also seeing? I expected the map to match:

https://www.census.gov/quickfacts/fact/map/columbiacdpmaryland,US/PST045219

Thanks! 