This raspberry nonsense

Can anyone give me a definitive way to tell which are Glen Cova, Mailing Jewel and Tulameen  After last years non-existent harvest this winter I cut everything but 3 canes down on all the plants. The theory was Glen Cova would fruit on old canes and Id be able to spot it and Mailing Jewel and Tulameen would need new canes.

I've just checked and they're all producing flower buds 

All 3 are summer fruiting, so will fruit on the old canes 

http://www.chrisbowers.co.uk/category/raspberries/?stpos=25

All 3 are summer fruiting

They were supposed to be an "all season collection" from parkers, I assumed (wrongly it would seem) at least one would be autumn fruiting?

My way is to cut any cane that has fruited...

Something which is really needs them to fruit for you to be able to tell 

So if I have this correct I cut (after it's fruited) anything I have tied up this year - and tie then the rest up for next year, so Im not expecting any fruit from new growth this year?.

I have tulameen and ive found that any stems that have fruited and that I have forgotten to cut down, simply stand as dead and woody stems the next year - no regrowth.

The point is that you were expecting to be able to tell which is the "autumn" fruiting one by being the only one which will fruit this year, on new wood.  That will still happen.  I think you were also expecting that it wouldn't fruit on the old wood that you left one cane of.  But it will, evidently!  It's just that because autumn fruiting ones also fruit on the new wood, we always cut them down after that first crop, because it's simpler and preserves the later cropping.  Unless the varieties have walked into each other and you don't actually have one cane of each variety...