Ramblingrose22 FreeBMD are transcribing the index pages, and for a marriage there are two entries in the index, one for each partner. If John Smith married Mary Jones, the page with John Smith on it may be transcribed at a different time, and by different transcribers, to the one with Mary Jones on it, so it is possible that they have not yet reached one partner in the marriage you were looking for.
Each page is transcribed by at least two separate people, and any differences checked out by a supervisor, so there are few mistakes.
Did you email them to tell them about the 1858/1968 mistake? They would be grateful to hear about it from someone who knows for a fact when the birth occurred.
I have done some transcribing for FreeBMD. They were always looking for patient accurate people to transcribe. If anyone has an hour or two a week to spare I am sure they could use your time. They assign you photocopies of a few pages at a time, you download them, type the entries into a text file and return it to them and receive the next page. You can do as much or as little as you wish, no deadlines so long as you keep doing a bit at a time. I asked if I could do a specific date range and surname initial as I was researching family for that time. Didn't actually find them, but it was very interesting.