I'm using a TEE2 too and quite often seeing numbers out of sync with the rest of the day. Like you, I re-test, and obviously if I get roughly the same again I have to accept that it's true, but if I get a rather different number I'm not sure what to think. Unlike you, I'm too mean to use up 3 strips on one reading! Today I got a surprise 7.2 and when I re-tested I got 7.4, so that was me told! I'm pretty inexperienced. I'm hoping over time patterns will emerge so that I'll have a better idea which readings are incorrect.