it's because of the new champ select...
http://www.surrenderat20.net/2016/01/red-post-collection-hextech-crafting.html
We’re sharing a list of known issues with new champ select to consolidate feedback and bug reports. Like all other features, we’re taking an iterative approach to new champ select, and will be building on the feature in the months to come. If you see anything outside these issues, post here! We’re planning to fix all of these issues over the next few patches.
Unable to purchase skins in new champ select
Unable to select chromas in new champ select
Unable to select ward skins in new champ select
Unable to disable animations in new champ select
Champion ability details do not show on mouse hover
The “See more stats” button in the Leagues tab of the Profile page has been disabled for both individuals and teams
TRIAGE: An issue with MMR-clamping at high-tiers of play was causing exceptionally high queue times. This should be improved already with further upgrades on the way.
SOLVED: An error on our end allowed for an exploit of the tier restriction to be bypassed in Ranked Draft. That has been fully resolved.