There is an “8 bit” representation of an I2C address, where the bottom bit is actually the Read/Write bit and is, by convention, set to zero to describe the address.
There is a “7-bit” representation of an I2C address, where the address is shifted one bit to the right, so the read/write bit disappears and is not part of the address.
Half the manufacturers do it one way, the other half the other way.