Texas Estates Code - EST § 1023.002. Concurrent Venue and Transfer for Want of Venue

(a) If two or more courts have concurrent venue of a guardianship proceeding, the court in which an application for a guardianship proceeding is initially filed has and retains jurisdiction of the proceeding.  A proceeding is considered commenced by the filing of an application alleging facts sufficient to confer venue, and the proceeding initially legally commenced extends to all of the property of the guardianship estate.

(b) If a guardianship proceeding is commenced in more than one county, it shall be stayed except in the county in which it was initially commenced until final determination of proper venue is made by the court in the county in which it was initially commenced.

(c) If it appears to the court at any time before the guardianship is closed that the proceeding was commenced in a court that did not have venue over the proceeding, the court shall, on the application of any interested person, transfer the proceeding to the proper county in the manner prescribed by Section 1023.006.

(d) When a proceeding is transferred to another county under a provision of this chapter, all orders entered in connection with the proceeding shall be valid and shall be recognized in the court to which the guardianship was ordered transferred, if the orders were made and entered in conformance with the procedures prescribed by this code.