how close to you watch the dealer count the chips when you play?

[mj2]

i play mostly online so another live lesson i learned the hard way at the wsop. blinds were 150/300 with 25 ante. i went all-in preflop with KQs for $2,800. i was called only by the small blind with pocket 10's. i picked up a flush draw on the flop so i had 15 outs. i rivered a king so i was quite relieved and the guy next to me said nice hand. i turned and said thanks and the next thing i know i have a pile of chips in front of me.

so i start stacking them. the next hand someone in early position raised and everyone folded so on to the next hand.
as the dealer is passing out the cards, i finish stacking my chips and i realize they seem rather short. i know i should have atleast 5,600 because i was all-in for 2,800 and was called by someone who had me covered. plus there was the big blind plus antes. i quickly count and realize i have only 5,000 chips. i immediately let the dealer know who stops and calls the floor. the floor says we are 2 hands away from the hand and he can't go back and change anything even though every player at the table verified i went all-in for 2,800 and was called. and with the big blind and antes i should have 6,100 but only have 5,000. this is 20% of my stack.

is this really the right ruling? and more importantly, how close do you watch people count out their chips in tournaments. do you really watch every player count their chips when they make a call or bet. i figured the dealer is suppose to verify the chips and this wasn't something i needed to do.