Cannot unisolate layers in AutoCad LT 2014

I isolated 2 layers in a drawing.  While working on those 2 layers being isolated, I again isolated one of those 2 leaving 1 layer.  I executed the LAYUNISO command which brought back the last layer (that I had isolated after executing my first LAYISO command), but did not unisolate all of the other layers that were isolated during my first LAYISO command.  I attempted using the LAYUNISO command again, but it still remains with only those 2 originally isolated layers and I cannot unisolate the other layers.  I have also tried the LAYON command.  All of the other layers are on and are not frozen.

I woiuld appreciate any help that anyone can provide me with unisolating the other layers.

Thanks!