Are you certain that Ernie did not offer Gee a contract for the remainder of the season before his 2nd 10-day expired?
I ask, because I know the guys in the front office well enough to know that it would be extraordinary for them to overlook something like this.
My guess -- without talking to anyone about it -- is that while Gee was on his 2nd 10-day, the Spurs approached Gee's agent and said they'd be interested in signing him. The Wizards also offered him a deal for the remainder of the season. But, the chance to get guaranteed money and go back to the Spurs (he'd already been to training camp with the Spurs, and had played for the Spurs D-League team) was attractive so he left.
Now that the Spurs have cut him loose, the Wizards are looking better.

It is possible for a player to sign somewhere else without it being caused by gross incompetence by the Wizards front office. Or maybe they should have made Gee an offer he couldn't refuse.
I can see Ernie now, "Alonzo, either your signature or your brains will be on this contract."
"A lot of what we call talent is the desire to practice."
-- Malcolm Gladwell
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