Help! I'm trying to do the Save Time online. I actually did it with a previous reservation that i had cancelled without a problem but I can't get it to work this time

. I'm trying to add an additional driver and it's adding on $10 a day. According to their website,
Alamo Insiders don't pay that fee...how to I get it to not charge the fee? I dont' want to deal with the counter to add a driver (we just won't add me if I can't get this fixed) just wondering if I'm missing a step! It's letting me add myself with no problem, it's just charging the fee when it does
The reservation has my husband's alamo insider code attached as we are using the coupon code.
Any suggestions? Thanks!