Ask a Lawyer and Get Answers to Your Legal Questions
With regard to the council deciding to "table" the opening of the third bid, this is going to be within the council's discretion (they do not have an obligation to review each of the bids, particularly when they are not taking action on the item (accepting any bids).
With regard to the meeting that was held in private, this may be a violation of the state's "Sunshine" (or open meeting) laws, depending on whether or not a quorum was met during the private meeting. (This is usually where the violations occur). You can find a very helpful discussion of the Penn. Sunshine Act here: http://www.dmlp.org/legal-guide/pennsylvania/open-meetings-laws-pennsylvania