If the lines you used were too stiff they won't seal properly and will drip ever so slightly but over time it will add up. I fought one ski before I got it all sealed up. Put a white paper towel under there to see what was leaking then go back and check. I suspect you have a hose leak or fitting. I am still looking for a source for the OIL lines other than Seadoo (8mm and 12mm I believe). They are awfully proud of those hoses $$.
Clean the bottom up real good and lay down some paper towels. Good Luck !!