Line Speed Check Please.

[#1]

Line Speed and IP Profile different?? on plusnet connection stats 48.4mb but my ip profile is only set at 42.22mb can these be matched up?
Thanks
[EDIT]
Ive just noticed that my profile now says 42.2mb as well this is a drop of 6.6meg from yesterday, completely unacceptable!, getting very fed up of this now, have had many engineers out and conversations with plusnet, this never gets fixed for more than 5 minutes before going down again, i shall be off at this rate, theres better deals about!

[#2]

Hey Boodz85,
I've conducted some tests on the service, you're currently syncing at 43.6Mb/s. I appreciate that this is a drop, but unfortunately our suppliers won't investigate as a speed problem unless it drops 30% below estimate. I'm really sorry about this