Yes, your credit card information is kept secure. As the payment processes are carried out through a SSL (Secure Socket Layer) site, your card number and other related details can not be hacked by another person. This has been a widely accepted method for payment process.
Yes, QCommission provides Audit Logging feature. QCommission Administrator can set the Audit Logging levels in Audit Option section.
No, More than one user cannot execute the calculation process at a time. QCommission warns the second user before executing the calculation process.
Yes, you can create/enforce password rules.