I click the quick mask mode and select the brush tool. After covering the areas I want to work with using the brush and leave the quick mask mode, the whole picture is selected in lieu of the areas I brushed over and highlighted in red. I wonder if this has anything to do with the quick mask mode or the brush tool or others?
Your info is completely devoid of exact technical info, so this isn't going anywhere. We know nothing about your system, your document settings, color modes, the exact tools used and their settings and a million other things. Provide that info and possibly screenshots.