I can happily say, mine does not exhibit this problem. I am using the optical matched reducer/flattener for the 62. I cannot comment on other reducers as I do not own any to try out.
I have posted up subs on my short review without them processed indicating the CA your experiencing is not evident.
You might have had a bad scope, you should approach your seller for a replacement or a refund, whatever your happy with.
With regard to it using Premium Glass or not, that's the purchasers choice. The same thing not long ago was said about the Evostar 72ED, but still it has been proven to be a good scope for imaging.