keychains with a name of "login" are usually ones that have been migrated from several versions of os x back, when "login" was the default keychain name. Now they default to your username. it may simply be throwing an error due to the name difference, and not really represent an actual problem
it's always been a little dicey to muck with a keychain, and now with the keychain daemon that caches those things, I am really loathe to mess with them unless necessary. (strange and sometimes maddening errors can result) So while you could change the name of the keychain, you would be playing with fire. I would recommend you let sleeping dogs lie.
