Changes

Lets say you have a four tile area you want to be completely level. You stand in the center of that area at point reference corner 'x' below, and examine the tile borders leading to corners 'a', 'b', 'c', and 'd' showing how high or low each point is compared to yourself.

Remember that slopes are measured on tile borders, and dirt is dug or dropped at the corner you are standing nearest to. The message "Two dirts steep toward you (ie DROP)" means +2 on this diagram; "One dirt steep away from you (ie DIG)" means -1. The message has nothing to do with how you are facing, and everything to do with where you are standing in the tile. Since corner B is one dirt higher than corner X , and corner A is one dirt lower than corner X, go dig a dirt from corner B and drop it on corner A, making both of those borders level. Dig two dirt from corner C and drop them on corner D and tile border X->C will be level as well, with corner D still needing one dirt from elsewhere (go dig outside your four tile area). You'll need to do the same thing now observing e, f, g and h relative to a, b, c and d to make the edges level (don't dig/dump from points you've already leveled).