Bad MIDI controllers or normal occurence?

So, when I started recording years back, I inputted MIDI with my Roland digital piano. Just a digital piano, no MIDI controls.

Fast forward a few years - I moved and couldn't take the digital piano with me, so I got myself an M-Audio Oxygen 49 controller. Now, when I would record MIDI with it, occasionally, I would get changes in some MIDI parameters in the recording - I assumed this was a loose MIDI knob on the Oxygen getting wobbled my my hitting the keys, and this is what I got for investing in a cheap keyboard.

Now fast forward some more years - I moved again and have more space, so I thought it was high time I invested in another big keyboard. I got a StudioLogic SL-990XP this month. Now, I figured "This is a better quality keyboard, so I shouldn't have to deal with the same issue as I do the Oxygen 49." But guess what - the mod wheel on this controller actually wobbles and gets caught in my recordings more than the knob on the Oxygen.

So is this a normal thing that most people just ignore and learn to deal with... or do I just have ****ty luck with buying controllers?

It's common for continuous controllers to send spurious messages due to the vibration of playing.  Controllers that use analog pots and A/D converters are the worst.

You should disable all controllers that you're not using in the keyboard if possible or tell Sonar to ignore these messages.