We're currently working to address a bug in the latest software related to tokens.
Tokens are purchasable at a discount compared to purchasing listings one at a time (i.e. 10 tokens are $8.00, vs. 10 listings are $9.90) and then can be used to pay for listings.
However, thanks to Newbielady, we've found that while tokens function as expected for 'new' listings, the token balance is not offered as a payment option for 'renewing' an existing listing.
We're working on this and hope to have it fixed shortly...but wanted to post about it in case other's hit it in the interim.