The council-run training centre and two others have been suspended by several examining boards in a crisis which first came to light at the Metrochange House NVQ Training Centre.
Already 73 people have been told their National Vocational Qualification awards are invalid and another 80 are having to do extra work.
The work of 230 trainees at Keighley and at Bradford ITEC is currently under scrutiny.
Tuesday's training sub-committee heard students are able to carry on working but are unable to gain qualifications until the situation is clarified.
Worth Valley Conservative Councillor Kris Hopkins says he fears this is the tip of the iceberg. "I am very perturbed at the numbers involved and that problems go back to 1996," he says.
Officers told the sub-committee the centres had been brought back into line with urgent action taken to remedy problems.
But it was agreed to put pressure on the QCA and the examination boards to clarify the situation as a matter or urgency.
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