Patricia....I dont know where you are in the time line for your entries.....I also find it easier (IF I am the only one working the more recent profiles) to use the maiden/birth name for women.....
Put the name in both the surname field AND birth surname (you obviously were not on Geni when there was a LONG discussion regarding the non-PC use of the phrase "maiden name".....which was subsequently changed to read "birth surname" (there are also some men who changed names....).
IF I am the only manager I use the birth surname for women.....as you said, it helps to determine who is who....
As people join you as co-managers (and some will change the surname to the husband's name) you will still have the birth name in the 'birth surname field...
You can also put the name into the 'display name field'......with the first name, married name, then (maiden name)
Whatever you choose to do....you CAN enter the info into the about me that lets people know that, i.e. ( Mary Smith was dau. of Joseph Smith and Mary Adams ). If you have dates and places...great.....if not, at least people have a better chance of picking the right 'match' to make.
As to 'tree matches'.....they are ONLY POTENTIAL MATCHES......in NO WAY are they meant to suggest that they are correct......(they are just Geni's best guesses for possible matching).....YOU are the one that has to make that decision........and if you find a probable GOOD match.....go to COMPARE......to see the data more fully.....
You can 'hover' over any name on the compare to find out more about that particular person.....(parents,spouse, etc, birth date, birth location)......to compare it to YOUR data....
Again, do NOT merge unless you are sure that the people involved (all the people) are the exact same..
Do NOT be afraid to 'decline' any 'match' that you are not sure of.......it does not get dropped from the tree....it just goes back into space..... waiting for its proper placement....
Whatever info you have should be in the 'about me' (in the event a mismatch does occur, then you will at least know which combination is correct....and can get help in fixing the problem of wrong parents or wrong spouse, or wrong children)....the more info, the better in 'about me'.