I checked the John Frazier that you linked at your message: [http://www.wikitree.com/wiki/Frazier-248]. The profile manager of this profile is Edie Anonymous http://www.wikitree.com/wiki/Nibling-2. If you think the date s are right but the familymembers are not, I think there are two possibilities. Orrrr there is another John Frazier, with the same birthdate and deathdate, what seems very unlikely but it is possible. Or it is the same person. As this profile is created by a gedcom and no useful sources are added there are no proves this profile is right.
Please click on the Changes Tab at the John Frazier profile and you will see that this profile is imported by a Robert Wayne in 2011. Then adopted by the next in 2014 and by Edie Anonymous 2 days ago. Please contact Edie Anonymous with a nice and friendly message and ask her if she is family of John as you are and if she is okay if you clean up the profile and add good sources etc.
I hope that was helpful.
Oh..... I checked your profile Linda. :) I think you re not able yet to change anything at the profile unless you sign the honor code of WikiTree. [http://www.wikitree.com/wiki/Special:Honor_Code] If you like to contribute on other profiles you have to abide that code first. It must be on your starting NAV page of WikiTree I think.
Kind regards from the Netherlands,
P.S. If you hit the green frazier tag in your message above you will find more questions about the frazier's.
Another possibility is this the right (other John Frazier) but the wrong dates were added.