It's hard to say the issue is based on a test center. The reason being everyone had their tests done in different centres across the country. But let just keep waiting.
Now I think why they want us to redo IELTS. It might be because they can't finish processing files by Jan end. So to get more time, they are asking us to redo the test. >:(
Bro, the thread you mentioned refers to the delay in publishing the results by British Council. It has got nothing to do with re-doing IELTS requested by CIC.
I guess most everyone who got to ReDo IELTS took their test from North India (it still doesn't make sense). Any other thoughts? Or may be they are trying to buy more time.