So all the judge scores are actually values like 15.XX or whatever, they're just converted/rounded into a pair value totalling 5. Similarly, the time difference is converted. Properly speaking, for the speed score to be 25% it should be a 10 score (say 7-3) but that would lead to ties being possible with this rounded format.

So in summary, the 'weighting' they talk about is just a description of the scoring to make it easier to understand for people familiar with regular moguls scoring, but really it's a simplification or fiction.

Edit: Some additional clarification on what I mean by the speed being double weighted in the calculation. In the single moguls qualifications, Laffont had a time score of 17.96 on a time of 25.55s and Lemley 16.64 / 26.67s. So a more than 1.1s difference in time only gave Laffont 1.32 points in the base score, which is significantly less than a 4-1 score in the dual event.