Few months ago I installed a Tie bar onto my 02 accord - Rear Lower.....

Last week when I replaced my 4 tires, I noticed the back tires were worn out on the inside.

With the new ones installed I laid on the floor from behind approximately 5 feet and noticed that my back tires need to be aligned.

wtf.....I dont have my car lowered. I have no clue how I lost the alignment.
Can someone explain to me why this might of happend?

Also with the new tires on ( Falken 205/60-15 ) when driving I hear like a hummming noise from the rear.

Could it be because of the alignment and or wheel balancing?