There seems to be a system bug with the XP counter -- I can't for sure how long, but it has been noticeably faulty for some time so I took more notice today.
Today, I played Day 42 as a CTTH, and earned 1085 XP (+10 for CTTH, +1006 for Day 42, +18 for Hits in tournament, +51 for Tier bonus).
Total 1085 XP earned for the round.
My XP before this round was 5,542,514 and now after this round it is only 5,542,571 -- it only increased by 57 XP, not 1085 XP.
That's about 95% of my earned XP missing and not being added -- and it's happening every day. I've also used the online form to contact support, but thought it was worth adding here in case others are noticing the same thing.
I play WGT both via Windows and Mobile -- happens on both platforms.