It’s exceedingly rare to have any misalignment issues when joining our tracks. Id say less than 1:100 units have an issue and it’s easily solved. Take a trusted 90 degree square and see if the cross cut on the aluminum track itself is off on one of the tracks.
If it’s hard to tell an alternative method to check is to leave a business card gap between the tracks rather than butting them tightly together. If this provides an automatic straight joint with no fiddling, one of the faces is not exactly 90 degrees. If you can pin it down to an extrusion we’ll replace it for free!
If the two faces are pressed tightly together and both are not exactly 90 degrees then they will override the dovetail connectors and misalignment is the result.
Thank you for the honest feedback and I wish you would have reached out as soon as the issue came up so we could resolve it!