What was the change to your Utilization? If the first payment of $162 dropped you from say 15% to under 10% that can be a significant increase, however if the second payment dropped you to 0% on all cards that can actually have a negative effect. Also a single card with the balance at near max is a negative so a small payment on a small credit line that is near max is a good jump but then taking that one card down even further doesn't matter as much.
In short there are lines that it makes a big difference to be under, so a small amount can matter if you are boarderline. But once you are in a bracket moving around inside that bracket makes small differences so you need to drop down into the next bracket.
An example, if I have a small credit line of $300 and a balance of $300 a payment of $162 drops me on that card to less then 50% a really good score improvement.
I also have a card with a $15000 limit and say a $1500 balance (10% Util on that card), if I make a payment of $350 on that card it drops me to $1150 and changes Util to 7.6% a relatively small change.
