Internet Security Subscription Renewal

My Avast Internet Security is coming up for renewal and I get this message popping up on my laptop from Avast:

Renew for 1 year $29.99 [I understand this]
Renew for 2 years $54.99 [I understand this]
Renew for 3 years $139.99 [I do not understand this]

Shouldn’t a 3 year renewal be less than $90.00 if 1 years is $29.99?

here it say 99 old price 139 http://www.avast.com/en-us/internet-security

http://www.avast.com/internet-security (3 years for 99.99)

I appreciate the replies.

I do not know what to tell you but there is a glitch with Avast’s Popup that I am receiving because it does say the 3 year renewal rate is $139.99.

Thank you.

You’re welcome.

Btw, here’s a nice offer: Internet Security - Up to 3 PCs, 2-year license - Right now: $89.99
http://www.avast.com/store