I think the problems run deeper than that, because you have multiple different groups you are trying to communicate with, and some of them are getting incorrect information here.
If borrowers want to know how much they are paying in interest rate, then I think you should tell them in terms of APR. If borrowers want to know how much they are paying in terms of dollars, then that's easy, just tell them.
I think itemizing out fee A, fee B, fee C, is just a silly game. If you go back to your "About this Loan" table, what you call 'Service Fee' and 'Interest Rate' are the same thing, just combine them. Then, if I want to know how much they actually cost, I have to look at Total and subtract $50? But then it's still missing the "one-time fee".
What if the table did say; (and I'm not saying you should do this)
Loan Date: April 14, 2014
Repayment Date: June 2, 2014 (7 weeks)
Amount Requested: USD 50.00
Loan Fees: USD 13.51 (200% APR)
Total Amount: USD 63.51
Of course your system knows if I'm a repeat borrower, and can automatically charge the $11.78 or not. Look, it's a hard truth that the first loan has terrible terms because of the registration fee, but you can't hide from it.
The only problem with this is it doesn't really help me understand how much it's going to hurt if I need more than 7 weeks to repay. But I don't know enough about your payment model to really comment on that.