How do I track tender deadlines and corrigenda?

Tender deadlines move: buyers issue corrigenda, extend closing dates and answer clarification requests, and a bid team that reads only the original notice can submit against a date that no longer exists. In TRINTA every matched tender carries a dossier with the closing date and a countdown, the procurement documents attached and, in the Portuguese market, extensions and rectifications applied the same day they appear in the official gazette.