In the Targeted Dispel section of the power description of Dispel Psionics it says:
You make a dispel check (1d20 + your manifester level, maximum +10) against the power or against each ongoing power currently in effect on the object or creature. The DC for this dispel check is 11 + the power’s manifester level. (XPH, P. 94)
Augmenting this power works like this:
Augment: For every additional power point you spend, the bonus on your dispel check increases by 2 (to a maximum bonus of +20 for a 5-point expenditure).
This has not been errataed, but I suspect the last paragraph should read "For every additional power point you spend, the maximum bonus on your dispel check increases by 2." This would enhance Dispel Psionics in a way that is close to "Greater Dispel Magic".
The text as given does not make sense to me, as there is no +10 bonus on the check that could be raised to 20 spending 5 points.
Is this assumption correct or are there other ways to interpret the way augmenting this power works?