I needed to move the clamp contact with the blank further away from the slope to put pressure straight down where the slope angle wouldn't pinch and skew the blank away of 30 degree slope. As a result of this, I wound up with pieces that weren't all 30 degrees and they were basically firewood! You can see how they didn't fit and I soon after determined that the blanks were not seated properly in the sled. I cut the blanks 30' long and I wasn't paying too much attention to how the blank was seated in the sled. The first thing I did was to thickness plane each plank to the same thickness, so I know they'll all be consistent. I then got in 'production' mode to cut all of the blanks and got careless. I saved those test pieces and went out to buy enough of the 3 wood colors for a cutting board. I tested them further by cutting one long plank each of the 3 different woods (cherry, maple and black walnut) and checked how they fit together and it was a nice tight fit. After making the sled I tested it out on a small pieces and measured them and they looked great.
