If when you evac the pet has agro'ed a mob and the mob has not been back to its spawn point, do not re-charm. Pet is still on its hate list and the agro'ed mob will come after you.

Yesterday I charmed an exhausted bloodtusk in Nadox. Before start keeling, somebody trained blackhands and brocken skulls across the bridge to the laggard side. I thought it was good since I did not need to clear the blackhands in order to get to the broken skull initiates. I got my pet there, killed two then found that the train was coming back slowly. I ordered pet to attack to buy me some time for looting the corpses. Then I evac. Comming back re-charmed the pet, within seconds the train is on me lol. Had to evac again.

That has been there for awhile in nadox. There has been many a time I have been trained when I fought out there, zoning clears the aggro off the pet instead of evac. What is really fun is if someone else hours before evacced, left the piggie up with about 30 or so luggalds on the aggro list, and they all charge you when you charm him. Another way to help get around that is just kill your piggie if you had to evac, they spawn fairly often at alot of points, so killing the phs, about 20 of them will get ya a nice fresh aggro free piggie!
Features I tell ya.