So I did some CSS changes on my local, ran git add ., git commit -am \"Hello\", git push heroku master, and for some reason two commmi
Try running 'heroku releases' and 'heroku ps' on the command line.
heroku releases should show you which git version Heroku currently has running -- this will let you compare your local git revision to the one Heroku has, to ensure it actually received your updates.
Next, you might want to check heroku ps, and verify your app is running as expected.
Lastly, if all else fails, try running heroku run bash, and looking at the files Heroku has on your Dyno, if it doesn't add up -- email Heroku support!