ok it looks like you have them mildew/smell under control so I'm not going to address that but I will say what you need to do is check into a way to have the run off the water directed away from the basement walls/ house foundation. It will help with keeping the basement dry. You may have to dig around the whole foundation about 18 inch down and put in drain pipes (black drain pipes with holes in it) add gravel around it to help with water flow then cover the gravel with landscaping cloth, then back fill with dirt around the foundation so it slants away from the house. Most of the time when a basement has leakage is because the water stays against the walls with no where to go so it leaks through but if you can get it to drain away it doesn't stay long enough to seep through the walls.