You got it! The analysis results determine what ending you get. If the boss doesn't tell you to re-check the data, you're on the path to the ending you're getting (with the crude drawings in the office.) To get the other ending (with the longer dream), you have to get the "recheck your data" result for both. (I think the order is "more downer" results for the first prophecy, "more upper" results for the second. Or just accept every data point, that should get you the second ending.)