Just spotted a few more errors:
Shankill to Greystones / Greystones to Shankill (€1.70 single which is less than just going to Bray)
Shankill to Sandycove & Glasthule (€1.70 again, reverse looks okay)
Sandycove & Glasthule to Dun Laoghaire (does not quote, but reverse does)
Maybe the system needs to be rechecked for other combinations.