How Bad is This Lean?

[Yick]

Our pool is about half full when we noticed this lean. How serious is this? The high side of the pool is only 1" max (probably closer to 3/4") higher than the low side. The only reason why I can think this is happening is that where I dug out while levelling on the left side of the pool in this picture there is a bit of a lip so the leg can't expand out any further, and the leg is right against the lip. Should I dig out the ground a bit more so the leg can move out further?

 

[Yick]

Also, for the record, the side the the posts are leaning toward (the left side) is actually the highest side of the pool (currently 19 3/4" deep). The low side of the pool is around where the ladder is, and it is currently 20 1/2" deep (give or take 1/8" for both measurements).

 

[jseyfert3]

The only reason why I can think this is happening is that where I dug out while levelling on the left side of the pool in this picture there is a bit of a lip so the leg can't expand out any further, and the leg is right against the lip. Should I dig out the ground a bit more so the leg can move out further?

I would. The legs can and do need to move outwards as the pool fills.