Our company had 2 progress payment applications open for a project with a general contractor. One progress payment is through October and the other through December. They just paid our December invoice but are holding our October payment until some fixes are made on the job. They sent us an unconditional progress waiver to sign with the through date through December. Should we sign this if we still have not been paid for October? If we sign it, is our October payment still covered with the wording on the waiver's exceptions below? "This document does not affect any of the following: (1) Retentions. (2) Extras for which the claimant has not received payment. (3) Contract rights, including (A) a right based on rescission, abandonment, or breach of contract, and (B) the right to recover compensation for work not compensated by the payment." How should we proceed? Thank you.