You could see what PT3 thinks the current blinds are using the [fairly] new "live stats" mechanism. Blind level info is based on the last hand imported as that is the latest information we have.
You could build a custom stat with an expression:
live_table_stat( amt_bb )
..to display the size of the BB in the last hand. This will be "wrong" for one hand at the start of each level when the blinds are different to the previous hand (which I guess is problem you're reporting?), but should match the data that the "show stats from current blind level" HUD option is showing.
See "Live Stats" in the
Tutorial: Custom Reports and Statistics for how to build stats like these.