Yes they do, and I think these Targets are all satellite offshoots of a main motherlode deep down.
I could well be they just missed the hotspot of the deep IP target with the drill veering off target, but personally I feel T4 is closest to the motherlode based on the Copper and Silver levels found there so far.
MOD Price at posting:
5.4¢ Sentiment: Buy Disclosure: Held