What would be ironic would be if it turned out he'd really meant well all along.
That's my sense of what's happening. It always appears that Dracula is encouraging him to do the right thing but accept for going back to Mina, he does the exact opposite.
After watching Dracula Rising, I can see why he's so effective in manipulating Harker. Harker is very much like a young Vlad Teppes.