Interesting...
The Graham Thomas roses I got from Palatine are not growing either. It was a bit of a surprise because the plants I got from Palatine were massive and healthy. I bought three GTs: one is stone cold dead, two are growing very very slowly. It is rarely a problem of the English roses that I get from DA roses in Tyler TX. I cannot think of a single DA rose from them that failed - except for a Lady Emma Hamilton that I moved. And her replacement the next year that I didn't move.
I know you know all this, but ... As for moving it, I'd recommend against doing that until early spring. Moving roses in summer, especially ones with large root systems frequently causes really healthy roses to die, even when you are really really careful. That said, roses with root systems not so big as the head of a shovel will sometimes be amenable to being moved especially if they are taking a high-summer nap.
