Other mistake: In the scene where LL catches up to the suspect running from him, it is obvious that LL never really puts the handcuffs on the suspect. You can hear the noise but he is not being cuffed.
Other mistake: After taking their "road trip" way out in the desert and dropping Montel off at the penitentiary at the end of the movie, they are just getting back on the road and Hondo says that they will respond to the "211 in progress" at the diamond mart back in L.A. The camera shot then makes a point to show that they are out in Joshua trees miles from anywhere.
Answer: The SWAT Captain originally kicked Street and Gamble off the team and out of the SWAT Division completely for disobeying orders resulting in a hostage being shot. The SWAT Lieutenant convinced the Captain to keep the two officers in the division on a probationary basis to work back towards getting back on the team. Gamble was insulted by the probationary assignment and later resigned. The Captain offered Street the chance for immediate reinstatement to the team if he placed all blame on Gamble. When Street chose the probationary assignment over blaming Gamble or resigning alongside Gamble, everyone assumed Street cut some type of deal to remain in the SWAT Division without knowing the whole story.