Hi everyone!
There is such problem in my Cubase Artist 9.5.
I try to input 64th notes to the midi track and set Quantize presets to 1/64. But when i try to input the note (i.e. pressing ALT and clicking the mouse) it’s input length is 1/32 instead. Can do nothing with that. This problem appeared only last week with new tracks, all my previous projects didn’t have such problem.
Can anyone help please? 
Up to where you have Snap ON/OFF, GRID, then you may have Grid Type to the right of that, make sure that is set to quantize and not Adaptive zoom
*IF you have that available in 9 or 9.5
It would help to see your computer specs, Cubase version, interface and that kinda stuff in your signature like mine. Click your User name top right then User Control Panel/Profile/Edit Signature
Thank you.
Yes, i do have adaptive zoom, but everything is set to quantize, not to adaptive zoom. This solution does not work 
.
Found the decision here:
Found, it was necessary to include the length of the quantization. Key editor, right mouse button at the top of the panel, Length Quantize.
I dint have to quantize any length here to get 64 note duration inputting the quantize with the mouse as you stated. weird. Glad you have it sorted