[Elecraft] K2 power output

[Slater Tubman]

I have noticed an irregularity on my K2 output.

When setting the power level a 2 watts, and then using the ATU I get a 
reading on my SWR/power meter in the line of 4 watts.   Setting power 
on the K2 to 3 watts, I get 4 watts on the in line meter. I thought the 
meter might be faulty, so replaced it with another with the same 
result.  And the ATU gives me a reading of, say 1.3:1, whereas the 
SWR/power unit shows 3:1.

Do I have a problem.  If so, how do you suggest I address it?

Thanks
Slater VE5OA
SN 4519