Walking my dog, when I am home and walk him more does that cause any problems?

I think it will actually help him feel more relaxed for the rest of the week. They are like us when it comes to exercise. If you have a very long, exhaustive run one day of the week, you'll be more tired and less willing to go on another one the next day. Any extra exercise is beneficial to them and help them get through the long weekdays when there's nobody at home. So go for it! :)