While I find myself enjoying this mystery I also find myself cursing Frontier. From a pure game play perspective ie not using external tools, there should be some way to gain more information or insight to this dilemma.
For example:
A pilot notices a military convoy with an Unknown Probe in one of the ships cargo holds.
The Military Transport ( A python ) has some semi unique comms chatter
Transport to Command. Affirmative on the pick up of Cargo NHE-17, on route to test site.
Transport to Command. NHE Cargo secure. On route to designated co-ordinates for orbital testing.
Pilot chooses to follow the Python to see where it goes, it jumps system and player follows it there. [New system - Wolf 1453]
Some more comms chatter (not unique).
It then heads towards a station. [Station name - Akers Gateway (not sure of spelling)]
It then appears to drop out at the station (player suffered a crash to main menu at that point).
Whether or not it was going to do orbital testing there or not is up for the usual internet jury to decide, but I personally doubt it.
My main point being that if the NPC is saying the things it does, it should actually do what it's saying. Otherwise players will essentially ignore NPC chatter for being meaningless.
Since Unknown Probes are currently rarer than rocking horse poop, no testing can be done with regards to said planet / station.
Long story short: Frontier, if these things are just tidbits of info, that's great but rephrase the chatter to make more in game sense. ie if the ship is not going to the designated co-ordinates, don't tell us they are.