Explain to me how Blackjack Exchange can do this......

Right I backed a small stake on the dealer to win, dealers up card was a 10.

So the first 3 hands busted out and the fourth hand had and Ace and a 5 as the hole cards.

So the fourth hand gets 5 card charlie BUT they got a 2 as their first card and that adds up to 18 and normally if you get to 17,18,19,20,21 they stand regardless of what the possibility of getting 5 card charlie.

As I have been on both sides of this now were I have had an ace, 6 and a 3. Totaling 20 but still the posibility of getting a 5 card charlie so it doesn't make any sense to me.

If somebody could clear this up for me it would be much appreciate. Furious right now as I seem to be on the end of these questionable rules everytime!!

Thanks, Welshie.