Do you have the Automatically Apply Treat As option enabled in Configure > Sites & Import Options > Preferences?
888 do not specify the table size in their hand histories so you need to have that option enabled for PT4 to estimate the table size based on the number of active players.
Note that because 888 write hands while you are waiting to post the blinds you should NOT reposition the HUD during this phase because you are not active and therefore the stats will not have been rotated. Wait until your first played hand has been imported and the stats have been moved, and then position them as you want them, then PT-icon > Save Layout. When you join a new table the stats will only reposition correctly after your first played hand has been imported again.
The
Tutorial: Preferred Seating refers to PT3, but the setup is basically the same. Check out the "Troubleshooting" section for more detail.