APP支付的商户号和微信公众号的商户号能是同一个吗？现在是分开使用的，导致退款的时候只能分开退款。

同一笔订单多次申请退款，返回状态均显示成功，但是微信上并没有收到退款通知; 请求信息为： <xml><appid>xxxxxxxxxxxx</appid><mch_id>xxxxxx</mch_id><nonce_str>xxxxxxxxxxxxx</nonce_str><out_refund_no>xxxxxxxx</out_refund_no><out_trade_no>xxxxxxxxxx</out_trade_no><refund_desc>xxx</refund_desc><refund_fee>1</refund_fee><refund_fee_type>CNY</refund_fee_type><sign><![CDATA[693xxxxxxxxxxxxx23]]></sign><total_fee>1</total_fee></xml> 返回信息为： <?xml version="1.0" encoding="utf-8"?> <xml>  <return_code><![CDATA[SUCCESS]]></return_code>  <return_msg><![CDATA[OK]]></return_msg>  <appid><![CDATA[xxxxxxxxxxxxxxxx]]></appid>  <mch_id><![CDATA[xxxxxxxxxx]]></mch_id>  <nonce_str><![CDATA[5xxxxxxx]]></nonce_str>  <sign><![CDATA[7E6168C5D0908CxxxxxxxxF]]></sign>  <result_code><![CDATA[SUCCESS]]></result_code>  <transaction_id><![CDATA[xxxxxxxxxxxxxxxxxxxxxx]]></transaction_id>  <out_trade_no><![CDATA[1xxxxxxxxxxxxxxxxx]]></out_trade_no>  <out_refund_no><![CDATA[1xxxxxxxxxxxxxxxxxxxxx]]></out_refund_no>  <refund_id><![CDATA[xxxxxxxxxxxxxxxxxxxxxx]]></refund_id>  <refund_channel><![CDATA[]]></refund_channel>  <refund_fee>1</refund_fee>  <coupon_refund_fee>0</coupon_refund_fee>  <total_fee>1</total_fee>  <cash_fee>1</cash_fee>  <coupon_refund_count>0</coupon_refund_count>  <cash_refund_fee>1</cash_refund_fee> </xml>

同一笔订单多次申请退款，返回状态均显示成功，但是微信上并没有收到退款通知; 请求信息为： <xml><appid>xxxxxxxxxxxx</appid><mch_id>xxxxxx</mch_id><nonce_str>xxxxxxxxxxxxx</nonce_str><out_refund_no>xxxxxxxx</out_refund_no><out_trade_no>xxxxxxxxxx</out_trade_no><refund_desc>xxx</refund_desc><refund_fee>1</refund_fee><refund_fee_type>CNY</refund_fee_type><sign><![CDATA[693xxxxxxxxxxxxx23]]></sign><total_fee>1</total_fee></xml> 返回信息为： <?xml version="1.0" encoding="utf-8"?> <xml>  <return_code><![CDATA[SUCCESS]]></return_code>  <return_msg><![CDATA[OK]]></return_msg>  <appid><![CDATA[xxxxxxxxxxxxxxxx]]></appid>  <mch_id><![CDATA[xxxxxxxxxx]]></mch_id>  <nonce_str><![CDATA[5xxxxxxx]]></nonce_str>  <sign><![CDATA[7E6168C5D0908CxxxxxxxxF]]></sign>  <result_code><![CDATA[SUCCESS]]></result_code>  <transaction_id><![CDATA[xxxxxxxxxxxxxxxxxxxxxx]]></transaction_id>  <out_trade_no><![CDATA[1xxxxxxxxxxxxxxxxx]]></out_trade_no>  <out_refund_no><![CDATA[1xxxxxxxxxxxxxxxxxxxxx]]></out_refund_no>  <refund_id><![CDATA[xxxxxxxxxxxxxxxxxxxxxx]]></refund_id>  <refund_channel><![CDATA[]]></refund_channel>  <refund_fee>1</refund_fee>  <coupon_refund_fee>0</coupon_refund_fee>  <total_fee>1</total_fee>  <cash_fee>1</cash_fee>  <coupon_refund_count>0</coupon_refund_count>  <cash_refund_fee>1</cash_refund_fee> </xml>