I have the same problem- but what I found was that, the more i tested with different companies ( free ones mostly) I started to get a bigger picture of my DNA.. i sort of got a mean of all the results together. my results summed up were
ancestry dna
almost all irish- french - tiny bit of Spanish scandinavian
23and me
almost all irish- french- tiny bit of ashkenazi jewish
family tree dna
irish eastern europe
livingdna
irish and 5 percent indian???
my heritage
Irish, scandinavian 7 percent west asia

DNALand
irish, scandinavian, Finnish, spanish, european jewish, india/ west asian
Then gedmatch managed to break these down even further... I sort of cross referenced all the tests, and researched the movement of people around these parts, to understand why i was getting such a different genetic makeup from all these websites.
I still don't really know though, hope the science gets better to the point where they are agreeing more. some sites say I'm up to 20 percent west asian- then others say completely european !! aaahhhhh
overall I think the DNA tests are worth doing- even if it is new science- as I didn't even know I was Irish so....