I just got a rude awakening. I went to redeem a voucher for a trip on the Coast Starlight. I was going to use my leftover funds from a trip NYP/WAS. I just read the fine print and saw that once I use a voucher, any balance remaining is forfeited.

The funny thing is that I've been using an Alaska and United voucher and haven't had an issue.
Anyone have experience with this?
dh