That's actually a visual bug.A training esoterica does boost your exp gain, however when it displays how much exp you gain, there is a limit as to how much is displayed. The display is capped at 99999, so if you're exp gained is over this limit, rather than showing a higher number, it rolls back around to 0, if that makes sense.So you are in fact earning 99999 exp + the 25k exp it is showing.It is explained better here: http://epicpw.com/support/x2-exp/msg104153/#msg104153 Im not overly good at explaining something like that but the esoterica does work, it's just the display is bugged.
Well explained :3Your picture thingy is pretty by the way. qq