EXP40 Page confusion

When Page 1 is selected, pressing a key on that page actually rings someone in the same position on Page 2. E.g. Aaron is in the first position on Page 1, and Dave's in the first position on Page 2. Pressing Aaron's button dials Dave.

We note this problem on 2 different EXP40 connected to the same T48G.

Please advise!

Thanks,

Phil