Have you tried the AerLingus web-site recently
We use IE for LPA-BFS and FR for LPA-LPL. The routes don't duplicate.
Usually when the "total price" ends with .00EUR/GBP it's with taxes. When the "total price" ends with .99EUR/GBP it's without...
Once you now the Ryanair tricks it's a great bunch!
Interesting. I'll keep an eye open for that