To formalize the counterarguments to your objection:
-Were it more than one round, Haley would have to be considered too dazed and confused to move away;
-Were it more than one round, Elan would have to be considered too surprised to stop Thog;
-Were it more than one round, Thog would have to either be below level 6, or not taking a full attack action in one or more rounds for no particular reason.
Any one of these counterarguments would be strong evidence supporting my statement that Thog took one round; together, I feel they are irrefutable.
As such, I would like to formally request that Thog be listed as Fighter 2/Barbarian 9+ based on this strip. (relinked for convenience)