Outdated highway information

I just finished a series of maps for a client using the google api. One
of the maps shows the location of an apartment complex near I-94 in St.
Paul. It is labeled on the map as 12/52 - two highways that run with
I-94 for a short period of time. However, the main trunk is I-94, and
that is what people know it as. If I skip the api and go to google's
site, it shows the highway as 94 and 52 and 12.

Has anyone else experienced this? I have to say that I find it a little
hard to believe that Google somehow left off the correct designation of
the interstate highway that links st. Paul, Minnesota, with
Minneapolis, Minnesota.