Not able to put entire project budget in the first period automatically in oracle fusion ppm.

Not able to put entire project budget in the first period automatically in oracle fusion ppm. I created a custom spread curve and put entered the distribution factor as 10 in the point 1. For accounting period profile, i am giving only the current period as 1, rest all the preceding and succeeding periods as 0. Now when i am creating projects with duration of more than a year, all the budget amount is automatically loaded in period 1 but the same is not happening when the project duration is less than a year. Any suggestions what i am doing wrong?