Managed to book myself a flight on Eva from ORD to SIN last year in business for this Oct. With the confirmation number given by UA, I was able to choose seat 5K ORD to TPE and 3A TPE to SIN. But when checking my itin on UA, 5K is not showing while 3A is showing. Upon checking on Eva's site, both are showing. Is it normal for UA to not show all the seats chosen? Or do I need to call EVA to double check if my seats are selected? Be my first time flying EVA.

Thank you.