Question 1. Whoever told you that is mistaken. K1 works like any other Pentax i have owned. Take a number of pictures...review the latest in 100% view then scroll back through all your images. All will be 100% view.
Question 2. have you ever used manual mode ? It is called manual for a reason. You set the shutter speed and your set the aperture
manually. Neither can possibly change unless you move the respective dials. If you are in danger of moving the dial by mistake then use the control lock button which will prevent you changing your settings.
To add to this...an explanation of how the AEL button works in manual mode. It does lock the exposure, but not in the way you were thinking. When the AEL button is pressed in manual mode any change you make to either shutter speed or aperture will be matched by the camera choosing a corresponding change to aperture or shutter speed. So your overall exposure will remain the same, but your shutter speed and aperture will have changed. This is obviously not what you want especially when using flash, so using the Control lock button is the way to go.
Last edited by pschlute; 07-29-2017 at 04:47 PM.