Both computers are programmed the same, only difference is they default the from station to where they are
Goon in DL probably keyed in DL to Drogheda, where as Drogheda would key in Drogheda to DL so the machines issued two distinct tickets,
For weekly or monthly tickets they charge the exact same fare regardless of direction, should be 221.00 Drogheda DL monthly and 61.00 weekly for the 2008 fares.
There are discounted fares Drogheda - Dublin in terms of day saver returns, but these are returns only and only as far as Pearse and not on Friday.
If they are up to something its new to us, and in your case you certainly should be paying the lower fare and as result of Irish Rail's lack of staff you got caught out. You are entitled to a refund, fill this in
http://www.irishrail.ie/images/pdfs/...unt%20Form.pdf
Claim on the ground ticket issued was not that requested and explain what happened