I was recently playing an SP game as the Cult, working on some strat for an MP game I'm in as the Cult. Morgan, blast him, went and mind-controlled a base out from under me with no less than (10!) probes. (I had 4 in the base... he wiped them out, naturally. I'm happy it took 10 probes to do it, BUT!!!) .
Anyways, the base in question had two worm units in it. Now, probes cannot subvert native units outside of a base... so why can they subvert a base with worms in it?

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Does anyone have any idea what the heck is going on here?
NS