Discrepancy in system data vs credit report- failed application

I did an application with a motor dealership last week and they informed me of some accounts not being updated on the bank based systems they use for credit evaluation. I was told this information is submitted by Transunion.

My credit report shows all accounts being up to date so how is there a discrepancy on the actual systems? This is very disappointing to get from a recognized credit bureau brand.

I need this to be urgently addressed as it's hampering my application. This should not be a problem I should be facing as a client.