Sounds like your selecting the wrong hunt number. For example say "desert" has a special hunt for rifle and archery. It'll let you select "desert" but you may be selecting the archery hunt when your license is only good for rifle. Make sure your selecting the right "desert" in the drop down
This is solid advice for others maybe struggling! I was trying to submit based on the correct hunt # though, I always use that for my submission!

if you see my above post, WDFW actually contacted me to let me know that my weapon choice selections were not retained during the purchase process and it’s a bug they are experiencing in the system this year