Parcel Post bug

[Idealproductsales]

Oh HO! I see... Non-Machinable Surcharge-

See : http://www.usps.com/mailerscompanion...mc0804art6.htm

The Parcel Post nonmachinable surcharge applies if the parcel is:
§ Mailed at the Inter-BMC/ASF, Intra-BMC/ASF, DBMC, Parcel Select, or DSCF Parcel Select rate; and
§ No special handling fee is paid;
§ Not oversized (C700.1.0c);
§ Meets any of the following characteristics (C700.2.0):
§ More than 34 inches long, 17 inches wide, or 17 inches high.
§ Less than 6 inches long, 1/4 inch thick, or 3 inches high.
§ Weighs less than 6 ounces or more than 35 pounds.
§ Contains more than 24 ounces of liquid in glass containers, or 1 gallon or more of liquid in metal or plastic containers.
§ Is insecurely wrapped or metal-banded.
§ Is a can, roll, tube, or wooden or metal box. Contains books, printed matter, or business forms weighing more than 25 pounds.

Parcel Post Nonmachinable surcharge (R700)
DBMC Parcel Select: $1.45
DSCF Parcel Select: $1.09

Note: The nonmachinable surcharge is factored into the rate charts for pieces mailed at the Inter-BMC/ASF and Intra-BMC/ASF rates.

So, in a nutshell, the calculated postage for U.S. is working correctly, and it is not a bug. if I recall, the O.P had the item listed at 2 ounces rate (including a box??? dunno..) but if that were the case, the parcel post calculation correctly included the non-machinable surcharge.