K7- shutter speed in manual mode

Hi
I am using the latest firmware on my K7 although I have had the same problem with all firmware versions.
I have noteiced that when in manual mode i sometimes find that for a given aperture, I do not have full control over the shutter speed. I have shutter speed selected on the front wheel and aperture control on the rear wheel.
When scrolling the shuter wheel, speeds keep cycling over a narrow range, usually the very fast speeds.
I cannot get my head around this.
I did in fact return the camera to SRS and they just just loaded the latest firmware at the time.
Has anybody had this problem who can suggest something?
Thanks
Neil

There's a custom option "Auto EV compensation" - can you check what yours is set to? (on page C2)

I'll have a look later and see if I can create the same symptoms.
Matt

Hi Matt
It is set to "on"

Neil

i found this in tv and in p mode it drops the shutter down, its the auto ev, try turning it off.

There's your problem. Just turn it "off".

When you hit a point where you can't get a properly exposed picture, auto EV will "kick in" and override what you want to do. The camera doesn't realize you want to over/under expose your picture voluntarily and "corrects" your "mistake". It just doesn't want you to be "clumsy".

thanks guys.

I will try this out
Neil