I'm also having the same problem with little or no taste and thought it was something i was doing being fairly new to vaping/mixing.
I started with the red label juice and i could really taste all the flavours, loved the cherry
the nic level in them was too high at 36, so i thinned it down by 50% and still got a fair flavour.
I decided to start mixing my own, I got all my mixing stuff, DV flavours (Blackcurrant, black cherry, cherry cheroot, orange blossom and red currant), AG and PI nic. since i started mixing from scratch it just tastes bitter/burnt
I tried all different mix ratios etc. but still was bad.
glad to hear its normal and hope it doesnt last long cos it tastes discusting