[rambow]

You don't have the cover installed properly. I can see the front flap is not hogringed on... That should be done before you do the sides,and you work your way back on each side... It's likely screwing up the bolster tucks.

Are the side springs or edgewire corners of the spring assembly broken? If so it can cause the cover not to pull as tight as it should also.

Do you have any pics showing where you moved the listing rods to? The cover appears to be tight in the center, so they are probably ok.

Just trying to step through what you mentioned and what I can see.