While treating the wounded Tok'ra, Dr. Fraiser calls for assistance from a medic, whom she address as a "corpsman". However corpsman is a term only used in the U.S. Navy and Marine Corps, in the Army and Air Force the term "medic" is used.
When the Ashrak first attacked at the camp, there were footprints left in the sand. When they attacked later, no footprints.
After Artok's body is carried out and the Jaffa and Tok'ra square off, there is the sound of multiple Zats being armed, but when they are visible in the hands of the Tok'ra/Jaffa, many of them are in the unarmed (compacted/un-raised) positions, from which they cannot fire. Also many of the staff weapons are in the closed position, from which they cannot fire.
When Jack picked up a higher-powered rifle and yelled, "Everybody down!" before firing in a circle (at waist height), he was also warning the Ashrak. So, easy to avoid the attack.
There is no good reason not to have an iris installed in the gate of the Alpha site, same as in the home base.
SG1, the free Jaffa and the Tok'ra all try to defend the Stargate from an invisible opponent who could easily have picked them all off one by one and moving quickly between kills would never have been discovered whereabouts it was.