Sounds like you have had some mixed results cobber, shame really cause you always here people recommend to go there becuase of there customer service.
The graph doesn't look that bad but as mentioned it doesn't look like boost creep with the dip...
From what i've read (i have based my opinion on so please dont get your knickers in a knot ) but you would have to accept some of the responsiblity when it comes to what fuel you are running to get the car tuned too (98 or 95RON) and also letting them know what mods you had in the car and what you wanted from the tune.
I know you said you weren't allowed to hang around (some tuners will do that) as it can slow things up and cost you more, BUT they still should of spent a little time with you before and after to discuss what you wanted/happened.
Being an auto i would say thats why they have loaded it up in 3rd for the tune, could & most probably very wrong with that assumption but if you take into account being an auto, with auto rear the ratio's are obviously different if it was a manual.
If your not happy (which you obviously are not) then i would go back and let them know that and also see what you/they can do to fix it, be it a little more time on the rollers for 98RON and up the boost a little.
At the end of the day its only a figure on a bit of paper chief, whats important is how it drives on the road
Keeps us informed how it all goes, im interested to hear what they have to say if you go back!!!
Cheers GMB