Spark Plug Firing Order

[bmw318tiChic]

I took out my spark plugs and forgot to notice what order they were in, and now I need to know how to put them back. Everywhere says that the firing order is 1-3-4-2, but my problem is that the 3 won't reach to where it is supposedly supposed to be. I checked which pistons were in the same position at the same time, hoping that I could switch a couple of the plugs.

I've got it plugged in right now as 1-4-3-2 (switched 3 and 4) and everything fits perfectly, but I don't know if this is problematic or if my car will run okay this way. So basically I'm asking if these are interchangeable.... Thanks so much