rear axle leaks

so i have my tacoma for about maybe a year now got it around
100thousand mile an i found the rear wheel leaking both side is
this comin? i read a few forum on here in need of help
i replace seal closer to the wheel still leaks

 

really my truck has about 135000 mile i recently replace just the seal that is
like 6 bucks it the one on the drive shaft colser too the wheel you may think its a seal
where my bearing is

 

Bearing may be worn causing too much play in return it damaged the seal. "IF" the bearing is shot, it needs to be pressed in order to be replaced.

 

ya i also think it has somthing with the bearing also i have so much like grease an oil caked up under my rear fender an that aint a common thing at all