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That’s not what it is seen in your last picture. There are 24960K being used, not “2MB with no other processes”.
We are going back to the same point. Instead of focusing on the used memory, you should focus on the available free memory. And until you try the suggestions already posted, there is not much more we can say, other than it seems still “normal” (or, if you want, plausible).
I understand that you would want to use less than that. If you are still interested, try first the suggestions already posted, and then report back. Please understand that there is no way for me to promise that it will indeed use less memory after the suggestions, but it is plausible.