eSearch 3.0.10 - spatialreference

I have the latest eSearch setup and everything works except the spatial search. At first, the buffer would not even be created, then I changed the <spatialreference> from the default 102003 to 102100 and then the buffer gets created. But, when I then try to "Search entities of" the tool will error out.

I am using Esri aerial as the first basemap loaded in my map, and I have my operational layers being projected on the fly from NAD83 UTM Zone20N to Web Mercator (WGS 1984 Web Mercator auxillary sphere). I noticed that when I had some features selected on the map they were not lining up exactly with what was shown on the map - then I applied the NAD83_To_WGS84_5 datum transformation and now they line up.

But, the question remains, my spatial search will buffer but will not 'Search entities of'.

Thanks for any help!!!