According to Wikipedia, the US radar station [SCR-270](https://en.wikipedia.org/wiki/SCR-270) picked up the Japanese approach and reported it, but this report was ignored as the duty officer, who believed the sighting to be [American bombers coming from California](https://en.wikipedia.org/wiki/Attack_on_Pearl_Harbor). It also states that SCR-270 was still in training mode. So far, everything is clear in this specific case but, looking at the bigger picture, I can't find a reason or reasons why. The article [SCR-270](https://en.wikipedia.org/wiki/SCR-270) goes on to state:

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> Despite the high level attention and the excellence of the school in training on the use of the SCR-270 and its integration and coordination with fighter intercepts, the army did not follow through on supporting the junior officers who were trained at this session
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Further, Wikipedia states that:

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> Except in rare cases, there was little interest in assisting or even cooperating with the goal of setting up the air defense system.
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The British had already demonstrated the value of radar, and shared both that knowledge and the specific technology they were using with the US.

Aside from the tendency of some people to ignore things they don't understand (which appears to have been the case with some army officers, though this may be hard to prove), are there any specific reasons why this 'high level attention' was not properly followed up on?