Possible erroneous code in LTE System Toolbox?

I am scratching my head here, trying to figure out if there is something wrong with the new LTE System Toolbox.

The function in question is ltePMIInfo.m

The lines in question are:

140    if (strcmpi(chs.TxScheme,'SpatialMux') || enb.CSIRefP~=8)
141        if (chs.NLayers==2 && enb.CellRefP==2)
142            info.MaxPMI=1; % !!! Seems to be wrong!!

To my understanding, in case of Spatial Multiplexing with 2 layers and 2 transmit antenna ports, there are a maximum of 3 precoders in the codebook (refer to 3GPP 36.211, Table 6.3.4.2.3-1). So setting maximum PMI to 1 means you are limiting yourself to just codebook indices 0 and 1. What happened to 2? Am I missing something?