conditional sentences

I have few pet peeves, but one of them is incorrect verb tense sequence in conditional sentences, like this one I just read in the paper:
"If we didn't do this study, we would have missed a lot of women with a genetic mutation."
This should have been:
"If we hadn't done this study, we would have missed a lot of women with a genetic mutation."
People get even more confused when they're using the verb "may". People don't seem to realize that "might" is the conditional of "may", so they say things like, "If we hadn't done this study, we may have missed a lot of women with a genetic mutation," which should be "If we hadn't done this study, we might have missed a lot of women with a genetic mutation,"