Maybe take a look at the outputs of :
and see if the new gestures are listed in any of them. If they are, they can also be edited/disabled from these commands (although the change will be temporary).
xinput list-props <Name or ID of your touchpad>
The ID/Name of your touchpad can be listed with "xinput" (without options) command. Post the outputs here if not sure.
While posting the outputs, please use 'Code' tags. It preserves the output's formatting and makes the post cleaner, compact and more readable. To see a quick 'HowTo' with screenshots, please follow the "Using Code Tags" link in my signature.