Hi, Rebecca.
As others have said, it does look like there might have been two different women named Lysbet Groot who married men named Jan Buys: (1) the daughter of Symon Symonse in Schenectady, married to Jan Janse Buys, and (2) this woman in Tarrytown, married to Jan Cornelise Buys. Or maybe there was only the one couple. Records are scarce. If we document every reliably sourced bit of information we have about these people (in the profile(s) that appear to correspond to the information we have), we may be able to figure out whether they are one person or two. To get this started, I did this for the baptism records of the two daughters connected to the Lysbet Groot of Kingston/Tarrytown. Details like the precise name spellings that appear in the record and the names of baptism witnesses sometimes turn out to be the best clues we have for associating people with their family group (because babies were named for their grandparents according to a standard sequence and because close family typically witnessed baptisms, particularly for the older children).
It would be great to get these families sorted out!
I'm not familiar with the sources you are using. They sound like secondary sources -- a category that can range in quality from dreadful to excellent. To the extent possible, we try to use primary sources, such as church records, as people can be driven far astray when we allow ourselves to be guided by secondary sources.
And please don't create any more profiles for Symon Symonse Groot -- he's already had at least 7 profiles created (and merged).
PS - For future reference, as a member of the project, you shouldn't need to be asking what project to contact about a New Netherland profile. To start a general genealogy question about a New Netherland person, you'll get better results if you use the ASK QUESTION link under "Collaboration" on the right-hand side of the profile, and be sure to include the New_Netherland tag (instead of the tags that are intended to help people find a project).
