Where are you getting your DI resin? My system has been on line for 6 plus years & I've only changed the resin once so far. Took over 3 years to exchaust it. Don't recall any foul smell. Incoming TDS here is around 170 and my 75 gpd RO gets that down to 0 during the cold months after running for approximately 10 minutes. In the warmer months once the incoming water gets above about 10 degrees C, I still get RO of 1 with similar incoming TDS. Source for my water is generally from Kalamalka Lake intake & incoming TDS is fairly consistent.
Greater Vernon has spent millions in the past few years upgrading water treatment plants. Our water rates reflect the spending & now due to more stringent health requirements mandated by IHA, they're looking at spending millions more! I do recall several times during algae blooms in the lake (springtime I think), they switched my source to Duteau Creek which they spent megabucks on a few years ago. When that happened, my incoming TDS dropped to below 50! Much softer water from the creek than from the lake. IIRC anything up to 500 TDS is deemed fit for human consumption. Over that and your supplier has to issue a boil water warning or shut down the source.
If you care for a longer read, here's an old post where I go on and on about how I run my RODI system to get the best performance out of it:
http://www.canreef.com/vbulletin/sho...590#post842590