When working with the multi part Line and multi part polygon Checks, if i select explode to break apart the multi part geometries, the first time, it actually deletes the selection, then I undo, and re run explode, then the geometries are exploded as expected. I am seeing this fairly consistent, the first I run these checks after creating a new session. So, for instance, I choose the single check parcel lines, the first time I select explode, the parcel lines, are deleted, then undo, then explode the second time, and I am good to go. If I then move to another feature via Browse, I am successful the first time for each subsequent explode where nothing is deleted. However, if I then run the multi part polygon tool, on say Parcels, the first time, the parcels are deleted, then I undo, then re run explode, and the geometries are correctly exploded. Each subsequent explode is then run successfully. Does this make sense?
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