I n view of the ladies not being too old, I would think that the marriage dates are probably correct.
Therefore, I would assume that you have someone's birth date entered incorrectly.
Run a Tools > Problem search > Problem List and uncheck all age at marriage and set something like 100 for the upper limit, it will tell you who has the problem.
I've printed out a list and will get to work as it certainly looks as though it will do the trick.
Thanks Alfred --Such a quick and workable response -- all the more reason for using RootsMagic over others.