YOU SAID:
Glad to have offered a stand-in.
INTO JAPANESE
スタンドインを提供してきまして嬉しいです。
BACK INTO ENGLISH
I'm glad to have provided a stand-in.
INTO JAPANESE
私はスタンドインを提供してきてうれしいです。
BACK INTO ENGLISH
I'm glad to have provided a stand-in.
That didn't even make that much sense in English.