Motova. The sensations in the body are really unreliable. If you tell someone to search for itches in their body, they start itching all over. The sensations are made up largely by what we give attention to. Just looking for irregular twitches in the body will produce them.
Regardless of what you are starting with, what you should aim for is a body that is light, pleasant feeling, and capable of meditating for a long time. There are two ways to do this, sit until it happens by chance, or use a fabrication to make it happen.
A fabrication here is like the suggestion to search for itches, but instead of itches you search your body for the comfortable light pleasant feeling and focus on it until it grows and the other sensations fade. You can do this by breathing in and thinking it is clearing away the irritation in your body, you can do vajrasattva and have his nectar clean out your body, or other fabrications. I do not think it is very important how you stabilize the winds in your body to make it serviceable for meditation. Once you do balance the winds it's very easy to direct your attention to other things since your body isn't troubling you anymore.
If your twitching is actually a wind issue, you can counter it with a fabrication. So when some winds create a vacuum or move quickly, either traveling a distance or spinning around in place, they can make you spasm. I don't think this is the case because you would feel it rushing around along with hot or cold and probably a lot of pleasure. But if it is the case, you can use a fabrication to slow down the winds, just imagine them slowing down or stopping and staying in place. I think that would work.
But whatever the case, twitching isn't a big deal. I wouldn't take it as an indication of anything