Tailgate window adjustment

Fitted a new rear window mech not long ago and everything works ok.

Noticed the other day that on the hinge side the glass want quite making contact with the seal,

Made numerous adjustments but cant get it to seat well.

After a couple of hours tinkering I noticed that the problem seems to be when raising the glass fully, it hits the top of its groove and then bows out slightly (if you know what I mean)

the glass is seated in its holders correcly and is central - anything else that can be adjusted ???

thanks