My advice based on your updated facts is to get some professional tax advice.
You have a situation where property has been contributed where the tax basis is most likely not equal to the fair market value. This requires special attention at the partnership level known as Section 704(c).
In relation to your question regarding the one member that made additional contributions. If your allocation of income, expenses, gains and losses are not in accordance with the member's capital account, then you definitely need to seek professional tax advice as your allocations most likely will not pass the substantial economic effect test.
Both of these issues require a one on one visit and are not conducive to back and forth in a forum such as this.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
