.gitignore not working

Even if you haven't tracked the files so far, git seems to be able to "know" about them even after you add them to .gitignore. 
A quick fix that I've used was to run the following commands from the top folder of your git repo:

(edited)

git rm -r --cached .
Followed by:

git add .
and

git commit -m "fixed untracked files"
This should fix your problem.