The guy quoted is a Florida lawyer and (like myself) may not know if there are any variations in practice in the State of Texas.
In most of the country the description of the duties and limits of a JP is correct, but from what I’ve seen here, Texas judges seem to have additional powers and responsibilities in some areas of practice and this may vary by the county.
There’s too much I don’t know except that the bails are abnormally high and the whole legal process I’m seeing in Waco stinks based on the process elsewhere.
Page 126 seems to be of interest, at the part under "Texas Code of Criminal Procedure".