If you see a "charge" on your account that corresponds to a refund, do not be alarmed. This is the administrative method UC San Diego uses to move a credit balance out of your student account before sending you a refund.
When your payments (Financial Aid, e-checks, scholarships, etc.) exceed your total charges, you are left with a credit balance. To send this money to you, the system must "balance" the account by applying a line-item charge. This "charge" is simply the trigger that issues your payment via direct deposit or paper check.
You can confirm a charge is actually a refund by looking for these specific descriptions on your e-bill:
If you still have questions, please submit a ticket.