Unfortunately yes and openreach will not move your line to a different cabinet just to improve your broadband. That explains the poor speed
Your adsl connection problem is due to noise on your line causing an unstable connection resulting in high noise margin and low speed. I have asked mods to see if they can help
your fibre estimate has nothing to do with your poor adsl connection just the distance you are from cab5. Openreach will not move you to cab 7 just because it is closer to you and would improve your fibre connection speed
Im not bothered about it just found it strange that my friend sits on cab 7 but is served by diff cab and thought that was an error in bt's information.
Possibly when you and your friends homes had phone lines installed cab 7 was not there and has been added subsequently the