It's probably not that unreasonable. As already noted, everyone is different, but two of the significant factors are what percentage of your total body weight does a loss represent and what percentage of your excess weight does a loss represent. In your case, 2 lb represents about 1.5% of your total weight, which is probably on the low end of what you should be able to achieve, but it is also and 20% of your excess weight, which is a significant amount.

Also, carb total is NOT the only factor. Other things, particularly total calorie intake, can overwhelm a good carb number if they are too far out of balance.

On top of all this the scale can easily mask real changes since it only knows how to measure totals. You may be retaining some water and consider that a quart of water is more than two pounds all by itself. Plus, your scale has errors and variability and many consumer-grade scales can show a pound or two difference in successive weigh-ins, let alone between weigh-ins separated by a month in which the temperature of the scale might be many degrees different.

At the end of the day, be patient (and I KNOW how hard that can be). You are trying to make changes that you want to sustain for the rest of your life. If you succeed, then a couple years from now you won't be bothered a bit by the fact that it took you ten months instead of two months. But if you let it get to you and you give up, then a couple years from now you will be bothered by the fact that you are still where you were a month ago (or worse).