Easy to edit a record. Open the record in transcription window, and then edit each person's record fields until they are correct. Hit Save for each person as you go. If you have more information about the from family knowledge, you can add that (lilke marriage date or maiden name) even if it is not on the stone.
There are a lot of tips for editing records and cemeteries buried in the archives of this Community. Take some time to look through and study the FAQs for pointers on these and other frequent topics.
And thanks for being part of our Community here.,