yes it is wrong to guide the new eaters to dip in everything at one go, they cannot distinguish the variety of taste. It is always good to take one side dish at one bite. The combination may not give you full satisfaction or maximum taste because Chutney is cold and Sambhar is hot. Again coconut chutney and mint chutney has got basic differences. Food guides please be careful. Whether it is Dosa Vada or Pappad you should ask them to first taste it without any side dish. Again Don't introduce Dahi first as it may lead to underrate the food because many of them are cold countries.