Yes that is accurate on both counts... they could have stayed longer but the hole wall/casing collapsed and as a result the testing was a one off - enter the hole and pull out, then the unit failed... They would have had to drill another hole in order to retest to target which was not feasible.
There should be plenty of time to drill to target (zones N18/19/20) on Merlin-2, test and possibly flow test. The Arctic Fox will get us there quicker.