PayPal Express结帐错误10413，但所有内容相加

客户收到一个10413错误，但所有内容都会增加。
我怀疑这是折扣代码，但我不确定。 以下是所提交内容的相关部分（为清晰起见进行了扩展）。 有人能发现问题吗

PAYMENTREQUEST_0_AMT=54.79

PAYMENTREQUEST_0_ITEMAMT=76.40
PAYMENTREQUEST_0_CURRENCYCODE=USD
ALLOWNOTE=1
PAYMENTREQUEST_0_SHIPDISCAMT=-30.56
PAYMENTREQUEST_0_INSURANCEAMT=0
PAYMENTREQUEST_0_SHIPPINGAMT=8.95
PAYMENTREQUEST_0_TAXAMT=0.00

INVNO=093543
ADDROVERRIDE=1

L_PAYMENTREQUEST_0_NAME0=Round 2mm Silver HotFix RhineStuds
L_PAYMENTREQUEST_0_NUMBER0=49267
L_PAYMENTREQUEST_0_AMT0=0.72
L_PAYMENTREQUEST_0_QTY0=10
L_PAYMENTREQUEST_0_NAME1=Round 2mm Gold HotFix RhineStuds
L_PAYMENTREQUEST_0_NUMBER1=49231
L_PAYMENTREQUEST_0_AMT1=0.8
L_PAYMENTREQUEST_0_QTY1=10
L_PAYMENTREQUEST_0_NAME2=Round 3mm Silver HotFix RhineStuds
L_PAYMENTREQUEST_0_NUMBER2=49367
L_PAYMENTREQUEST_0_AMT2=0.72
L_PAYMENTREQUEST_0_QTY2=10
L_PAYMENTREQUEST_0_NAME3=Round 4mm Silver HotFix RhineStuds
L_PAYMENTREQUEST_0_NUMBER3=49467
L_PAYMENTREQUEST_0_AMT3=0.78
L_PAYMENTREQUEST_0_QTY3=10
L_PAYMENTREQUEST_0_NAME4=Round 5mm Silver HotFix RhineStuds
L_PAYMENTREQUEST_0_NUMBER4=49567
L_PAYMENTREQUEST_0_AMT4=0.84
L_PAYMENTREQUEST_0_QTY4=10
L_PAYMENTREQUEST_0_NAME5=Round 6mm Silver HotFix RhineStuds
L_PAYMENTREQUEST_0_NUMBER5=49567x
L_PAYMENTREQUEST_0_AMT5=1.44
L_PAYMENTREQUEST_0_QTY5=10
L_PAYMENTREQUEST_0_NAME6=Round 3mm Gold HotFix RhineStuds
L_PAYMENTREQUEST_0_NUMBER6=49331
L_PAYMENTREQUEST_0_AMT6=0.72
L_PAYMENTREQUEST_0_QTY6=10
L_PAYMENTREQUEST_0_NAME7=Round 4mm Gold HotFix RhineStuds
L_PAYMENTREQUEST_0_NUMBER7=49431
L_PAYMENTREQUEST_0_AMT7=0.78
L_PAYMENTREQUEST_0_QTY7=10
L_PAYMENTREQUEST_0_NAME8=Round 5mm Gold HotFix RhineStuds
L_PAYMENTREQUEST_0_NUMBER8=49531
L_PAYMENTREQUEST_0_AMT8=0.84
L_PAYMENTREQUEST_0_QTY8=10

PAYMENTREQUEST_0_PAYMENTACTION=Sale
ALLOWEDPAYMENTMETHOD=InstantPaymentOnly

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你发现问题了吗？没有，还在等别人发现问题。一切看起来都很好，但不起作用。我缺少什么？版本=78.0方法=SetExpressCheckout PAYMENTREQUEST\u 0\u AMT=19.50 PAYMENTREQUEST\u 0\u ITEMAMT=15.00 PAYMENTREQUEST\u 0\u CURRENCYCODE=USD ALLOWNOTE=1 PAYMENTREQUEST\u 0\u SHIPDISCAMT=-0 PAYMENTREQUEST\u 0\u INSURANCEAMT=0 PAYMENTREQUEST\u 0\u SHIPPINGAMT=4.5 PAYMENTREQUEST\u 0\u TAXAMT=0.00 INVNO=123 ADDROVERRIDE=1L_PAYMENTREQUEST_0_NAME0=4mm Clear L_PAYMENTREQUEST_0_NUMBER0=25401 L_PAYMENTREQUEST_0_AMT0=1.5 L_PAYMENTREQUEST_0_NAME0=10 LOGOIMG=PAYMENTREQUEST_0_PAYMENTACTION=Sale ALLOWEDPAYMENTMETHOD=InstantPaymentOnly RETURNURL=CANCELURL=刚刚有一个非常简单的请求—1件商品+配送。它也爆炸了。刚刚发布了上面的代码。同样的程序，有些请求有效，有些请求爆炸，我看不到模式。我们将非常感谢您的任何帮助