I poured a small concrete landing outside the laundry/utility room. Size is 42" X 72" and 5" deep. When I set up the form I compacted the base and made sure I have a slope of 1/4" per foot over the 3.5' width which works out to be 3/4". I wet the area and compacted several times over the course of a week. Each time I checked the slope of the form, no issue. Then I did my mix and poured the concrete into the form. Once the concrete was poured, and troweled, before I did the broom finishing I was waiting I checked the slope on top of the form, and for some reason, one side still holds the slope, and the other side is perfectly level, no slope. I don't know what happened. I checked the slope before I poured and it was fine. However, during the mix/pour process I occasionally was tapping the form from the outside with a mallet to help settle and even the concrete. It is possible I tapped too heavy handed and disturbed the form. How would I correct this problem? Can I feather a thin layer on top of what I have - not sure how since the mix has 1/4" aggregates in it...do I use mortar?

There is a concrete swale next to my old house and a section of it has developed some cracks. Many of the cracks are fine with a few larger 1/8-1/4" ones. I'd like to find an easy way to stop any water leaking through the cracks. Appearance is not an issue, right now I just want to do something before the next time it rains. Can I make up a mixture of cement, sand and water and drizzle it down into the larger cracks? Cover the smaller cracks with a layer of cement? I'm open to any suggestions, temporary or otherwise.