Drop to one side after sitting for 2 days

I would like to know why my Mecede CL 500 drop on the right side after sitting for 2 days. I have taken it to the repair shop and had valves replace and was took that was the problem. That cost me $686.00. Two month later the same thing happen again. This time I was told it was some kind of filter was bad. That cost $265.00. Now I believe I am giving money away. All I get is try this if this is not it we will try something else. But I continue to spent money. Can you help me please. I also see someone else is having the same problem. Thank you Randy 404 936 6891