Thought everyone using Barclay arrival for large travel points redemption may want to know something that happened to me today. While trying to redeem my arrival points I found out they were capped??

Tried to redeem 505000 accumulated points for a travel charge to a cruise lines placed on my Barclay arrival card. It shows as a redeemable charge.

Logged on online to my account, clicked on redeem, the drop down choices show the maximum points I can redeem as 200,000 pts. It also says "can only redeem for each travel charge one time" which I knew. The terms and conditions for this card say “There is no maximum to the total miles you can redeem”.

Anyone heard or experienced the same ?
Called Barclay CSR , escalated it up to two supervisor levels all say...sorry but the system only allows that amount to be redeemed.
What am I missing something?