Brett,
Are you playing eight decks? This phenomenon seems to happen more with eight decks. Playing a shoe with caution at first, sometimes will give you a clue as to what to expect in the next shoe. Through experience I've run into cards that slowly work there way up in count, then plateau and bounce around a high number for several hands. This is dangerous to the card counter because when it freezes and bounces around the same high count you are getting stiff hands. At some point the count will fall, sometimes rapidly, that is when your bets will pay off. Being aware of the type of shoe you are playing helps in these situations.
Occasionally these shoes aren't playable for several shuffles because they slowly work there way up and slowly work there way back down again. The player and the dealer get stiffs the whole way up and back down again and it is more difficult to make a profit during those times. This is when card counting becomes very frustrating, you have high counts, you're betting more, standing more often, and doubling and splitting yields results as if you were in a negative count. Meanwhile the dealer:devil: is still able to make those fishy 3 or 4 card 21's etc. when they should bust. This is also the time when the other player,

who doesn't play very well, wins more hands when they hit and stand by thier "gut" and that adds insult to injury for the card counter. I've found that when you experience these types of cards you may be better off walking away to let them be shuffled a few more times. Playing the first shoe with caution and your "eyes open" helps to gain an insight as to what you have to work with the next shoe.
I realize this explanation sounds like voodoo but playing blackjack isn't always the way the book tells you it should be. Playing with your eyes open helps you to lose less money and that means you end up winning more....JtMM