many things. Some of these parables were repeated (and varied) on other occasions. There are no "discrepancies".
in. by. Greek. en. App-104.
parables. Here, eight (not "seven" as sometimes alleged) are selected for the special purpose of the Holy Spirit in this Gospel. See App-96 and App-145.
Behold. Figure of speech Asterismos. App-6.
a sower. the sower. As these eight parables relate to "the Kingdom of the Heavens" (App-114), the sowing must relate to the proclamation of it (Matthew 13:19): (1) by John, "the wayside", Matthew 3:2; Matthew 3:5; Matthew 3:6. (2) by Christ, the Twelve, and the Seventy, "the stony ground", Matthew 4:12, Mat 4:26, Mat 4:35. (3) by the Twelve in the land, and Paul in the synagogues of the Dispersion (the Acts); (4) still future (Matthew 24:14) and on "good", because prepared ground. See App-140., and 145.