A friend who also uses Rainmeter with the same program configuration that I am does not experience this problem. I think I know why.
When I open task manager, the CPU Usage History graph does not stretch when I expand the window horizontally, instead it will show more of the graph and what used to be covered by the sides (hor+ CPU graphs if you will). I remember enabling this option some time ago but I can't for the life of me remember how I did it.
I believe the reason Rainmeter is using this much ram is because its basically storing all of that CPU usage history that has long past extended past the visible part of the graph.
Can anybody tell me where that option is?