Mechanical Keyboard

i been using the marvo KG935 for a while now and suddenly the number keys got mixed up (not the numpad). For example when i press number 2 it comes out as 6, 3 as 7, 4 as 8 and so on. Please somebody help :( and thanks! (sorry for bad english)

I am using a rubber dome/membrane flat key keyboard on my laptop but I want to change to a mechanical keyboard. which type of keyboard should I buy. I am looking for a keyboard that feels as close as possible to a membrane. I am only looking for a key type not keyboard brand I need a...