I don't know, if I was more of a RO savant sort of person I'd help but I'm not. Is it a brand name filter set up? Maybe post a pick of the set up and some might notice a flaw in the configuration. If that doesn't work sell it to some one from Edmonton, get a new one and be done with it!
One other thing, you say "Nothing was changed in the old unit in the move; and it seems to me it was after a year that I really started noticing things going aksew. " Is that because you got a TDS meter? Could the thing be screwy from the get go?
For what it's worth I have one of these units and it's great because it supplies quality drinking water as well. The difference in taste is amazing.
http://airwaterice.com/product/1DUALHR
Dave