Yes the new 11th tee is level with the new 10th green, but the old 11th tee, which was down beside the old 10th green, remained in existence until very recently and the distance from there to the present-day green is 150 yards which is the length MacKenzie gives on his card of the course. And from that old tee there was no bunker on the direct line to the green.
A spanner is thrown in the works by another map of the course made by someone called Chapman, also in 1910. His map differs from Mac's in some detail (particularly the bunkering and several tee locations). It is professionally printed, rather than hand sketched, which makes it look more authoritative, but how accurate it is we can really only speculate. However, on his map the walk from the 11th green to the 12th tee is much shorter than it is today, suggesting that the green has been moved. But, as I said, a number of his tee positions do not accord with Mac's.
Have a look at the old picture of the 11th green (on another thread - Alwoodley pictures, for instance) and you will see that, while the bunkering style has been changed, the bunkers are in the same position as they are today.
In the minutes there are two separate entries in which it is recorded that permission was granted for the construction of a new 11th green. Nowhere is it recorded that this was ever carried out. If it was done it doesn't appear to have cost any money. Permission was granted some years before Alwoodley acquired the use of the land on which the current 10th green and 11th tees now stand.
It is not as straightforward as you might imagine.