not too surprising if you consider that alone in the past 9 months over 23m shares (including Ironridge's 6m+ shares in Dec) have been issued and relentlessly sold off on the market. Although many of those millions have been absorbed by buyers, I doubt buying has kept up with that kind of massive supply. That's why PPS has decreased.
But now the situation is reversing with demand starting to outweigh supply for the first time and will probably absorb supply completely within one or two months, leaving the PPS no place to go but up. Unless we get another big wad of new shares before EOY which I very much doubt.