hereami, I know that is a logical interpretation, but where are getting that from in the Texas county court at law system?
As I understand it, those courts have jurisdiction only in the county in which they are located.
From p. 11 of the linked document:
Statutory county courts can,(sic) include county courts at law, county criminal courts, county criminal courts of appeals, and county civil courts at
law. A statutory county court has jurisdiction over all causes and proceedings, civil and criminal, original and appellate, prescribed by law for county courts...A statutory county court or its judge may issue writs of injunction, mandamus, sequestration, attachment, garnishment, certiorari, supersedeas, and all writs necessary for the enforcement of the jurisdiction of the court. It may issue writs of habeas corpus in cases where the offense charged is within the jurisdiction of the court or any court of inferior jurisdiction in the county.
Texas classifies courts by subject matter jurisdiction, it appears.
From page 7 of the linked document:
While the courts have ruled that the Legislature may not limit the jurisdiction of regular district courts, the statutes frequently express the intention that certain district courts give primary attention to only a portion of those matters over which they have jurisdiction
The 65th Legislature, in 1977, converted all functioning domestic relations and special juvenile courts to distric courts of general jurisdiction. However, these courts have primary responsibility for cases involving family
law matters, including adoptions, birth records, divorce and marriage annulment, child welfare, custody, support and reciprocal support, dependency, neglect and delinquency, parent and child, and husband and wife. Section 24.601, Tex. Gov’t Code. Section 24.601 does not limit other district
courts jurisdiction nor relieve them of responsibility for handling cases involving family law matters. Courts with primary responsibility for handling family law matters are known as "Family District Courts....
The age of the marriage license could matter in understanding the terminology used. As I mentioned earlier, "domestic" also relates to "family."
Of course, I'm not a legal expert and I haven't the time to go into greater depth in the research, but, based on the document I linked, I still believe that my interpretation in #4 could be correct.