> I felt like that I should've got promoted after reporting those issues, especially since I found them within my frist two weeks
You won't ever get a promotion within two weeks, especially not over a single instance of good work. Do it a hundred more times, then think about a promotion.
I think you seriously need to re-evaluate your expectations about this stuff.
"My job is to make my boss look good, not to impress his boss or higher."
This is really important. Not only will it make your time at a company much easier, it will increase your chances of promotion and it will make it easier to get future jobs as you will have one happy manager who is willing to vouch for how good you are.
You won't ever get a promotion within two weeks, especially not over a single instance of good work. Do it a hundred more times, then think about a promotion.
I think you seriously need to re-evaluate your expectations about this stuff.