Are you using the newest version of my SwitchBot Curtain driver?
I added a configurable preferences option to invert the position information, because the reporting could be backwards for open/close depending on which side or direction they were physically mounted.
However, another user helpfully pointed out that I didn't plumb the invert option through the commands to open and close in addition, which is probably what is causing your issue with Alexa.
I am in the process of reviewing the proposed changes, and I think you will be a great beta tester to see if those help.
I'll contact you via private message with a version to try, and then let's continue any other discussion on the main thread for my integration.
