Multi monitor issue

[Hodsocks]

I have 3 identical monitors attached to the pc via HDMI cables, the problem I seem to be having is if I open a webpage on screen one and stretch it across the other two screens the top of the pages are not level. If I move one up or down to try and level them up, it moves all three. If I open three separate pages, one per screen they are fine.
I have another pc with a very similar spec, same screens and graphics card which performs as expected.
Has anyone any suggestions what the problem may be?

 

[Hodsocks]

Problem resolved, in the windows settings I changed the monitors round from the original 1,2,3 to 3,2,1 and then changed them back again and miraculously the problem had gone. Can't say it makes a lot of sense to me but computers don't always do what you expect them to.