Cheers @Capnbob, I’ve been doing exactly that (getting the zero or negative fibre scores) and blissfully eating aaaaaall sorts of high carb items in error. Nuts and nut butters galore!
Entering items on FatSecret often didn’t match up to the net carbs I was calculating from the packets and I was optimistically thinking ‘Ah well, the brand must have recently reduced their carbs’ or something
I seem to have accidentally joined a US FatSecret…which is different than a UK version…I think?
I’ll look up LoseIt now that you’ve recommended it. I just got a fitbit and was thinking of logging on that instead.
Either way, I have a few things to figure out before I’m on the straight and narrow purest path to Keto again! And thank goodness for @Lucinda 
Hope you enjoyed the trip back to the homeland. Just out of curiosity - what differences did you find in keto eating between the US and UK?