Hi!
RP warfare (https://mods.factorio.com/mod/rp_warfare) has turrets that sling molten copper/iron and when it lands it generates an ore patch (iron-ore-slag/copper-ore-slag) that can be mined up again. Prospector mod sees those patches as just another ore patch and generates the seams/veins/patches and depleted variants of them.
I don't think it makes sense to do that. Flinging a piece of molten metal should be gathered up in one miner go and not two rounds of prospecting and it shouldn't potentially generate an infinite ore source :)
Could you please blacklist those two ores from getting prospector to apply on them?