Ah! Perhaps it's only words like to counsel (counseled) or to libel (libeled); up in Canada here people usually write counselled or libelled.

Yes, in American English it depends on which syllable has stress. Compare:

dueled, paralleled, canceled, pedaled, but controlled, compelled, extolled, appalled

levered, snickered, but occurred, deferred

focused, biased, censused, but compressed, embussed, outgassed

worshiped, but entrapped (although even in America kidnapped seems more common than kidnaped—one of Webster’s less successful reforms)