Tax Bug in Marketpress 2.8.1

Hi @Aaron & Guy´s

we found a fatal Bug in Marketpress Total Price Calculation!

Here is the Situation:
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Shopsetup = Tax incl (19%)
Product1 = 0,05$
Product2 = 0.38$

Here is our Order:
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22x Product1 = 1.10$ (thats OK 1.10 incl 19% tax)
1x Product2 = 0.38$ (thats OK 0.38 incl 19% tax)

Here is the Problem:
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Calculated Tax by Marketpress = 0.23$ (wrong!!!)
Calculated Total Price = 1.43$ (wrong!!!)

The Calculated Tax should be = 0.24$
The Calculated Total Price should be = 1.48$

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1.10$ + 0.38$ = 1.48$ incl 19% Tax

Please can you FIX that as soon as possible! We can NOT use your Plugin with this Bug!