May be TEK split into 2 blockchain?
Why do you think so?
Anyway, you can check it -
getblockhash 1279841
should be
7f1d1ae088c739c200f986868474f4a7552500ebfb7cd1a25ba48ad0882f4a13
Mine is the same as well.
I also had problems syncing my wallet, I had to keep closing it down and staring it again, I did this about 7 times until it caught and synced smoothly.