Difficulty with tools Diff Vers blender

Working on the Pyramid challenge, going the extra, and having an amazing amount of difficulty.
Twice now, accidentally hit keys, no clue what, (tab the last time) and everything went to a plain white, no face/object view style, minus all the work I had done. Yes, been saving, but hadn’t saved the recent changes. First time I think with shift or ctrl, and s or… who knows… just poof.

I am unable to extrude or scale in an X/Y direction. Double clicking on shift Z to lock it, doesn’t stay locked.

Version 2.78c 2-24-2017 hash e92f235283
some things aren’t matching up exactly with the class version. Duplicate for example is different as are other options/tools.

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