There is no problem as such. There are astrological axioms which delay marriages which are different combinations of planetary placements with varying potencies. Astrologers can evaluate such positions and come to certain conclusions using logic and interpretation of planet placements. Not everyone is endowed with the best planetary placements and each of us have problems in some area or other which are generally unique in nature. For more details you can go through my blog navagrahastro.blogspot.in which will give you some insight into the usefulness of astrology in our life.