In Alert systems. Are the S&R contacts supposed to be deactive? As in "i'm supposed to take those pods to elsewhere."
Indeed—such salvage needs to be taken to a Rescue megaship! Any of the eleven are fine, not necessarily the closest. The Search and Rescue contact there is the one you want.
Do those pods contribute much? Also, is it worth the time to go straight to rescue ship or collect more than one batch of them before doing so?
If you are going to salvage escape pods, I would suggest collecting as many as you can as long as you are actually doing that and not being harassed by Scythes—although, if you can also destroy said Scythes, that combat bond contribution to system progress would be even better.
Unfortunately the actual escape pods are not worth very much for system progress; definitely they should be worth more and there should be missions for them, especially after Alert system strengths were increased so heavily for 3310.
Anything else i should know about Alert Systems?
If you need repairs, you can drop anywhere and wait for a Search and Rescue patrol!
Naturaly i forgot to ask the one i came here to ask. If i find any of those Orthrusses does it do any good if i steal that sensor it tries to pick up?
Unfortunately not! Many, many Commanders have asked that since the start in December 3308, but unfortunately only destroying the Orthrus will help the system. This was one of my points mentioned in Thargoid War feedback: One-year edition:
Orthrus-hunting here should have a very significant impact just with a few Commanders at most, as should looting and returning an intact Thargoid Probe, given many comments about them and Commanders hypothesising sensibly that removing the probes ought to harm the mission of the Orthrus.