Terminator tie ups

Had this really good conversation about terminator in school. We were talking about how Terminator Salvation might lead up to Terminator 1 and i just decided to type it down here

1) Why doesnt Skynet send Terminators to kill Kyle Reese in the past?
- Destruction of Skynet central in 2018 or some other EMP or Virus attack between 2018 to 2029(as referenced in the books and comic respectively) caused a major loss of data for skynet. Among the data lost or corrupted was all data regarding Kyle Reese.

2) Where is Derek Reese? Kyle's Brother.
- Around. Just not with Kyle at 2018(most likely separated). Derek Reese was only seen Serving with Kyle for a short year while Kyle was serving "under Perry, from 2021 to 2027". Which kind ties in to the fact that Kyle and Derek were seperated again in 2027 with Kyle being transferrd back to John Connor's personal unit and Derek once again on the search for Kyle until he finally gained access to John Connor and got sent back in time.

3)Kyle Reese told Sarah Connor "we move around during the night, makes it less easier for them to spot us". But in Terminator Salvation he says moving around in the day is less likely to get spotted.
- With the development of the infiltrator units and the humans increasing victories, Skynet must have changed its tactics. Increased ariel surveillance would make moving around in the day more risky than the night. Plus, at night, the machines can only rely on heat signature to track humans(which can be easily fooled by explosions or fires). In the day, they can track via heat signature AND light visual.
Not that moving around at night is not risky, its just the lesser of 2 evils.

4)What happens to the fully functional airforce that John had in 2018?
That was back when the humans were fighting out of the deserts and areas uaffected by the fallout. By 2029(the flashbacks in Terminator 1) they moved to the cities. Airplanes and helicopters would not be very useful for urban combat. Even less so for the squad based hit and run tactics employed by the humans at that time.

5)What happens to the massive human army that could hold its own against Terminators and even invade skynet central to extract Connor?
- Killed slowly via attrition.

6)Where are the plasma rifles??
- havent been developed as of 2018. Most likely developed later in the war.

7) How come normal bullets can take out terminators so easily but in T1 it didnt even scratch the T800?
- Bullets only took out the T600 when they were shot in their weak spot which was the exposed part on their left side of the skull. And mostly likely higher calibre or armour piercing rounds were used in the machine guns and assult rifles. In T1, only shotgun shells and pistols were used against the T800.

8)Marcus is definately more advanced than a T800. Why did skynet "downgrade" its infiltrators?
- Marcus was more advanced, but as an infiltrator he was too perfect. Skynet created a robot that mimiced all aspects of humans. Even loyalty to other humans and love. This resulted in skynet losing control of Marcus. T800 is more advanced in that, unlike Marcus which was solely a infiltrator, T800 was a combat unit encased in flesh. IT was designed for combat but doubled as an infiltrator unit. Plus, skynet had full control over it unlike Marcus.
By "downgrading", skynet was just learning from its past mistakes


If any more questions about inconsistencies come up i might most it here.