Created equal?

Sense the constitution was documented we have been created "equal" . Now this is something i don't understand if women didn't have the right to vote until 1920 and black men got the right to vote after the Civil war then how were we actually created equal. Even in these days, society can see that we are still not created equal. For instance until just recently Colorado state law did not prohibit discrimination against sexual orientation in the hiring of jobs. Now if all man is indeed created equal then why would it matter if someone had a different sexual preference then you do? Why should that determine weather or not you obtain a job? For years we have stood by and let our constitution be forgotten but no more! now everyone is getting ticked off!