Sid Rockitt you are right. According to the instructions the armrests are shown the other way round. However, they are designed so you have the choice.
REVIEWED WITH ARMRESTS THE "WRONG" WAY ROUND! (not per instructions) see Ikea catalog/products site for pics with armrests on Nice to see that even "professional" reviewers find it hard to follow Ikeas "simple" instructions ;-) Video not very informative.