I just had a flash--whether it's insight or foolishness remains to be seen. :)
The probes were in a circular position, all facing away from the platform. If Daniel had a task assigned to him specifically, he could easily have moved away from the platform immediately upon arrival. Gail, being next to him, could have seen him moving away. The probe on the other side (Enoch?) might have seen him moving away also, but not necessarily if he had immediately turned to go to the other side of the lander to rendezvous with the others, or if he was assessing the damage to his legs he might have been distracted.
Probes on the opposite side wouldn't have seen him if he immediately moved off, and may not have even been informed of his existence if it didn't affect their particular task. Hence, the differing stories.
As for traumatic/repressed memories, this happens to be something I know a bit about (did a Master's thesis on it; waiting to hear back on acceptance into Ph.D. programs for memory currently). Emotions are thought to be neurochemically based, that is, certain chemicals are present when a individual is in a certain mood. The probes appear to have simple emotions, but as far as I know, they don't have any biological material incorporated into their design.
In humans, traumatic memories of events threatening to the individual appear to be processed differently in the brain than memories of everyday events. (I won't go into specifics here unless you REALLY want me to :) ) This is all contingent upon the presence of the proper set of neurochemicals to set this alternate processing in motion.
Since the probes don't have this, how would this happen? If repression of traumatic memories is NOT dependent upon one's emotional state, then this is a whole new ballgame, folks.
-Psiclops