It could be that the blue lcd is faulty. Or maybe the blue lcd has a chip or backpack that the lcd guesser does not work with.
The lcd guesser performs several actions. First it tries to find the i2c address of the chip on the backpack, in the same way that i2c scanner works. This is why lcd guesser correctly reports the address. Next, it tries to guess the type of chip, based on the address. Then it tries to guess the connections between the chip and the lcd module. Different manufacturers may use different connections. The lcd guesser does not try every possible combination, only a few combinations that are known to have been used. Maybe your backpack is an unusual one.
Post the lcd guesser output you see on Serial Monitor with the blue lcd connected (please use code tags).