Review the sentence:
Folding the pile of T-shirts into perfect squares, Cory's laundry chores
got completed.
Folding the pile of T-shirts into perfect squares, a participle phrase, comes right before laundry chores, an illogical target. (Cory's, a possessive noun, functions as an adjective describing chores.) People, not chores, have hands that can fold clothes!
Before you continue, review the rules for misplaced and dangling modifiers.