Interesting.
A couple things changed at SP2 in regards to selection. The Parcel Selection tool now displays the selection chip for a single-click selection. This helps when trying to select one of multiple-stacked parcels. This was enhanced to support Parcel Fabric users that have multiple parcel types in the Fabric, and should be seen as an enhancement (hopefully). The second thing is that the Parcel Selection tool will work the same as the standard edit tool. This prevents you from having to continuously switch back and forth between tools just to make selections. The select-ability of layers should be controlled by the 'List by Selection' button on the TOC.
I've attached a screenshot for the "selection chip" showing its importance. The screenshot shows the Lot/Tax Parcel phenomena, where you need to only edit the tax parcels, but you also selected the lots. This also works in the Subdivision, lot, tax parcel scenario, or wherever else you may have multiple parcel types stacked.
David, the issue that you mention seems to be data specific, I will take a look to see if I can reproduce. I was unable to reproduce this behavior on a series of sample datasets including the tutorial data.
Chris
Parcel Editing Team