When Ireland are at home there is 2 athems played Amhrán na bhFíann and Irelands Call, and whenever they play an away game only Irelands call is played? Why?

Umm the two is because of Northern Ireland play for Ireland and as they are considered from the UK and not Ireland so they have to separate anthems. I don't know why for sure but perhaps the away teams do not want to hear 2 anthems and the Republic of Ireland show the respect to Northern Ireland. Still unsure.