Remember your cable will look exactly like your chart, so after you finish a cable row, just compare before moving one. The first row of cables is perfect, you have a RC, LC, RC, LC, but things go off in the next row of cables, You are supposed to have a LC, RC, LC, RC, but you have a LC, RC, RC, LC (which is making the second one into a horseshoe, another lovely cable), etc. Use this swatch as your learning tool. Compare it to the chart and follow each cable and see if you can tell where the "oh, shoot, I crossed the wrong way" moments are.
Ah that's it! Thanks for the reply, I'm not sure why it's so difficult to read the honeycomb pattern from the project itself, but the single cable was a lot easier in that sense. I think I did this swatch in the middle of the night, but will definitely make another attempt and then with more stitches.