Front jack point problem
 

I have a clean chassis that has never needed rust repair. However my front donuts are bending up (pushing the floor up) When I purchased the car, it had been stored on jack stands at the donuts for two years. I figured this fatigued the floor being stored in this way for so long. Just to be safe, I've inspected both sides of this area and NO rust was found( I even removed the seam sealer. Has anyone encountered this on a unrusted car? Is it OK place the two post lift pad partially on the seam weld to prevent further bending? This is only on the front of the car.
Thanks!

mine are like that a bit, try using a 4 by 4 inch piece of wood to spread out the load under the longs on the side. You will just bend and crush the seam weld too unless you put a little piece of wood on the lift

I've got floor intrusion from previous "professional" service where they did not bother to actually hit the donut. :(

My lifting pads are 6x6 so the loads spread out but I'm not sure where you mean under the longs on the side. Is that inside or outside of the seam weld?

Outside the weld on the flat part, check this out
http://www.914world.com/bbs2/index.php?showtopic=12283