Yes, ES misunderstood. I think you mean there to be two different reasons for closing an order: 1) if "its own" TP is reached, or 2) if a combined TP is reached.

Now, I also think that if doing so (i.e. the "own TP" closing), it will kill the hedging effect, and have the result of collecting losers and paying more dearly for them, since they no longer will have hedging trades to balance them.

On the side: by closing buys and sells pairwise, the EA actually avoids one of the trade spreads. Ordinarily a buy is closed against Bid and a sell against Ask. When closing pairwise, the buy and sell are closed against the same price, which thus saves one spread.