Newly inherited mineral rights in OK

Hello,

I am a brand new, green as they come royalty owner who has inherited mineral rights. I am trying to create a personal spreadsheet that list all of the wells located within my mineral rights properties. I have been using two websites to gather information.
1.) https://otcportal.tax.ok.gov/gpx/gp_PublicSearchPUNbyLegal.php
2.) http://wellbrowse.occ.ok.gov/Home.aspx

I have noticed that these two websites do not always have the same info though. For example, Cleveland County 17-09N-03W. The Well Browse OCC website returns 17 results and the Oklahoma Tax Commission websites returns 27 results.

Why is that?

I also noticed that the OTC website returns what are called “TRACTS”. Pardon my ignorance, but what is the definition of a TRACT in the oil & gas industry? Is that a certain amount of acreage?

Thank you in advance to all! I appreciate your time and feedback.