In the Summon Frenzy Totem skill tree, the node ‘Maim’ states “While Frenzy Totem is active, your Sabertooth’s ‘Flurry Swipes’ casts an additional time when used.”
The wording on Sabertooth’s skill ‘Savage Catalyst’ states " When your sabertooth directly uses a melee attack and hits at least one target it has a chance to use Flurry Swipes". To me this implies that both manually using Flurry Swipes and the procs from Savage Catalyst should trigger an additional Flurry Swipe, currently neither happen.
Video clip confirmation:
