1. When You place Trapdoors {Iron,Wooden} over an Grass Path it became Dirt, also you can't make the grass to grass path while it is under the trapdoors..
2. You can't Make Grass to grass path while is underwater, but you can Do it first Grass to Grass path and then put water Please Fix that bug so You can't put water on top of the grass pah.
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duplicates 1
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Please put only one bug report in each ticket. It is very difficult to keep track of bugs when they are not in their own tickets, and it is easier for you to make multiple tickets than for the mods to separate them.
And please use the search function in the future as all of the issues are reported multiple times.