[Q]

I am not 100% sure about this, but after what I observed the AI does only count the units/ships that are completed and ignores items under construction for the choice of further constructions. So it will add recon sats even if the construction line has more than enough. And once the items will be on the construction line the AI will not remove them. You can test this be removing in your game manually all recon sats from the construction line. If I am right, the AI should now not add any more new recon sat to the construction line. But if he does we have to investigate further.
Anyway 1 recon sat per planet is IMO too much. I would recommend 1 unit per 5.