DIRT being deducted at 33% and I thought it was meant to be 30%

It was increased to 33% in January AFAIK. See bottom of page here

Tax on deposit interest:
  • Deposit income is taxable via (1) DIRT at 33% from 1 January 2013 at source and (2) via PRSI at different rates but frequently 4% from 1 January 2014. Exceptions apply to DIRT for those aged 65 or over subject to meeting certain criteria.
 
Thanks for that Sue Ellen... you would think the revenue would update their own website wouldn't you!