It sounds like you may need to contact support. Here are two images to help

1. Enter a beginning capital amount (I used $11,000) I have two partners that get a 30/70 split.
2. Click the Special Allocations (starred in the 1st image) and enter beginning capital for the partners so that it totals $11,000 (from step 1) in any allocation you want. In my case I would have gotten 3,300 for one partner and 7,700 for the other, but I have entered a different total