That's not "a lease", its a memorandum of lease agreement which is what producers file "of record" in the recorder's offices. It puts affected parties on notice of the existence of an oil and gas lease covering your property but it doesn't disclose the terms of the lease (bonus and royalty).
What he said. Likely that the lease specifies how each strata can be utilized, ie plugging back to the Clinton. This gives Knox Energy the right to drill and produce all strata that are not the Utica/Point Pleasant
What I know about geology would fit on the head of a pin (with some room left over) but I was under the impression that the Clinton was a shallower zone than the Utica/PP. Thus you would never be presented with the potential to drill through those formations in order to reach the Clinton. Maybe I have my facts mixed up.
But, as Marcus stated, this memorandum merely discloses that Knox has no rights to produce from the Utica/PP intervals.
It doesn't make much sense to me to obtain Utica/PP "samples" when you have no rights to produce from those intervals. It does however make sense to drill through the Utica/PP formation if there is a prospect of finding deeper productive intervals. By the wording of the lease memorandum Knox would have the ability to drill to and produce from all formations below the Utica/PP.
Trenton/Black River Group, Trempealeau and Rose Run are all available below the base of the PP, though the PP is actually intermixed with the top of the Trenton.
Perhaps they're coring the Utica/PP and selling the data to Devon. Otherwise there's no reason to drill 50% deeper than the formation that you're after.