Signal finder just checks signal, it is the scan that you did that solved your signal issue. If you are still using Cork in ABM, next time ABM runs, your problem will return. So please change your Saorview area region in ABM to Kerry MULLAGHANISH.
Disable the following options too: FTA and FTA HD. Reason being- Saorview and Freesat are FTA only. The HD bouquet will be fine. Please also enable the channel swap option.
Before you remove the internet connection, please install Terrestrial Scanner plugin. Don't do anything with it for now.
Have you sorted out the EPG?