Board Thread:Questions and Answers/@comment-189.105.238.140-20151214195211/@comment-2602:306:BDD4:D180:B096:6EB2:B4E3:63AA-20171114065944

If you read the light novel, Sao aincrad volume 2, Lisbeth says that wielding 2 swords with the 1-handed sword extra skill is useless since the sword skills won't be activated due to error in the weapon use where the system cannot recognize dual swords unless you have the dual wielding extra skill. The fact that a titan's hand guild member could dual wield 2 axes was probably just an error made in the animation. Also, in Sao, skill connect wasn't a thing. It was just impossible. However, Alo allowed them to skill connect. I'm guessing it was just a bad game design but Kirito still mangages to use it efficiently. One reason why other characters don't skill connct with 2 swords is probably since they're not use to using 2 swords in the first place