beat and baseline editor does not use notes with specific length. Instead it uses sc. 'no-length-notes'. Those notes cant be dragged to a different length*.
You can however use length-notes!
Right-click in beat and baseline editor-track, and select open-in-piano-roll.
Here you have a normal grid and can insert normal notes, also 1/32 as you asks for.
Another way to make shorter sounds would be to make a short envelope in the instrument-UI, and still use normal beat and baseline editor 'tablets'
*The idea was to make them always play the sample from 0-> end, but out implementation has a fault. If the sample is longer than (afair) 1.7 secd it is truncated. That is wrong, and we need to fix it.
Besides that, since you are new in Forum
Welcome kalanfuga !
Here are all important links:
http://lmms.io/forum/viewtopic.php?f=1&t=4740
-A few rules and useful forum instructions
If you like to introduce yourself, to the community, go here:
http://lmms.io/forum/viewtopic.php?f=4&t=4480