That would be a normal prediction if you had ‘push over MPA’ activity during those sprints.
PP is an estimate of your 1sec power calculated from the power you generate during out of the saddle, all out sprints at high rpm that last 5-7secs.
References:
Breaking Through the Xert Way! – Xert (baronbiosys.com)
So, what am I doing wrong here? - Support - Xert Community Forum (xertonline.com)