PDO Exception - malformed SQL create table syntax on install

I've tried to install this module on a virgin Commerce Kickstart (Drupal 7.14) and received the following error:

PDOException: SQLSTATE[42000]: Syntax error or access violation: 1072 Key column 'pf_transaction_id' doesn't exist in table: CREATE TABLE {commerce_payfast_itn} ( `itn_id` INT unsigned NOT NULL auto_increment COMMENT 'Serial numeric ID of the ITN in the local database.', `pf_payment_id` VARCHAR(255) NOT NULL DEFAULT '' COMMENT 'The PayFast payment ID.', `merchant_id` VARCHAR(255) NOT NULL DEFAULT '' COMMENT 'The merchant_id of the payment receiever.', `email_address` VARCHAR(255) DEFAULT '' COMMENT 'The e-mail of the payer.', `order_id` INT unsigned NOT NULL DEFAULT 0 COMMENT 'The order ID the payment belongs to.', `transaction_id` INT unsigned NOT NULL DEFAULT 0 COMMENT 'The payment transaction ID the payment belongs to.', `amount_gross` DECIMAL(10, 2) NOT NULL DEFAULT 0 COMMENT 'The gross payment amount.', `amount_fee` DECIMAL(10, 2) NOT NULL DEFAULT 0 COMMENT 'The amount of fees collected by PayFast for this payment.', `payment_status` VARCHAR(255) NOT NULL DEFAULT '' COMMENT 'The status of the payment at PayFast.', `server` VARCHAR(255) NOT NULL DEFAULT '' COMMENT 'The server used to process the payment.', `created` INT NOT NULL DEFAULT 0 COMMENT 'The Unix timestamp when the ITN was received.', `changed` INT NOT NULL DEFAULT 0 COMMENT 'The Unix timestamp when the ITN was last updated.', PRIMARY KEY (`itn_id`), INDEX `pf_transaction_id` (`pf_transaction_id`) ) ENGINE = InnoDB DEFAULT CHARACTER SET utf8 COMMENT 'Stores processed ITNs.'; Array ( ) in db_create_table() (line 2685 of /var/www/commerce_kickstart/includes/database/database.inc).

An index (pf_transaction_id) is beign set for a non-existing column. Is pf_transactoin_id mistyped (should be pf_payment_id?)
or is there a missing column in the DDL?

I'd really like to take this module for a spin since there's not many options here in South Africa and the only payment modules available (given limited gateway options) is for Drupal 6.x.

Thanks for checking it out.