I just found a tree out there with a woman giving birth to 4 children 5 years before she was born, and then 2 more 4 years after the husband died. Another tree had children born to a couple from 1812 to 1871. The mother would have been 11 when the first child was born, and 70 when the last one was born. I have found married couples with several different sets of parents listed for the husband/wife/both, but their children's names and birth dates were all the same on each tree. Every family branch often had the same first names as every other branch involved, and lots of people had no middle name, so we need to be very careful about our dates and ranges. For an example, in one branch of a family, every single sibling may have had a son named John and a daughter named Mary, and their births could have been within a year or two of each other, so you can't assume that Mary or John Jones born about 1800 is the same Mary or John Jones born 1801 or 1802. You can't just assume that every tree you see has the correct information. If someone has it wrong and you adopt it to your tree, you throw the whole thing off, and your tree is wrong from then on. It is extremely hard to attach to trees from 1800 back, as there are very few actual records listed here, and families used the same names over generations and branches. It would be best to do your research before you attach to a tree, just save to your shoebox until you do your research. The research is all the fun, just grabbing names and attaching them doesn't help any of us. I have found so much wrong information out here, and I know it is wrong because I did the research years ago when you had to physically go to the actual courthouse, church, school board, cemetary and family bible to go thru the hadwritten records. This is a hard project, it takes time and perserverance, it's all worth it in the end IF you do the research!