Sofa bed on Blocks?

[Golferkids]

We have a 08 Cyclone 3912. We noticed that our Sofa bed would rock forward when we sat on it. Also the sofa is rubbing against the center Kitchen cabinet. After moving it forward we found blocks of wood under the side supports. The right side had a 16" 3x3 with a groove cut into it and the left side had 2 2x3 boards stacked under it one 16" the other 8". WE took out the boards and it seems to have solved the rocking problem but the sofa is still rubbing. Are the boards supposed to be there? are they supposed to be the same length? Any suggestion on how to stop the rubbing?

 

[Wallace]

Hmmm now you got me thinking...I had the same exact blocks under mine.
Every time I wen to get off it would tip forward...I thought it was just because I was fat Sounds like they are suppose to be there.