An earlier post on this blog ("Does Ancestry.com Know About Decimals?") noted decimal point errors in Illinois, Public Land Purchase Records, 1800-1990 at Ancestry.com. [note--this database is availalble free of charge on the Illinois State Archives website at http://www.ilsos.gov/isa/landsrch.jsp]
A search today of that database shows that the error has been fixed and the price per acre, total price, and number of acres has been corrected.
A set of search results for Andrew Trask shows the correct amounts.
Thanks to Ancestry.com for making the correction.