"Apparently the Gaming Control Board didn't catch the error before giving their approval."
The casino had to apply for a waiver from gaming before they would give approval. This actually led to a delay in the release.

"(the first Matsui chip ever produced for use in Nevada if memory serves me correctly)"
Memory is not good. 1st NV chip was a 50c Four Queens house chip released in November 2005.

"the number one chip manufacturer in Japan"
They'd probably never admit this to you but their manuafacturing plant is actually in China.