Hi Jessie,
Your problem is that you have a weekly income greater than the OPFO (lone parents allowance) even though its only by €23.00.
Your welfare officer may not have explained this you properly. Meanwhile on the rent issue, are you living with someone? If you are living alone or sharing ie not cohab, I'd get back down to the CWO and apply for Rent Supp, you would have to contribute the minimun amount of 13€ per week, plus the excess amount of €23 per week.Just get Rent Form and get Land lord to sign and take if to your council office, they will stamp the form stating you have a housing need because your already in rented accom. Your application for lone parents this will take about 6 months to come thru, on a brighter note it will be backdated to the date you applied.
Hope this helps,