Tag's already part of an alias, hence why I just made a normal forum topic for this, but kyuuri26 and kakuteki11029 are the same person.
They've begun posting furry stuff under a new name on Twitter, possibly because they found work as a "designer" at a game development company.
I did notice that they deleted a few tweets since then, so if they're trying to keep up appearances, it might be better to use the new name. However, not everything has been deleted, so there's also a reason to reverse the alias.
Updated by Versperus