Italian to English Tech/Engineering

". . . la qualità del servizio reso, molto più bassa degli standard internazionali che, peraltro, apparivano al di sotto di quelli raggiunti da IT"

My version:
"the quality of service rendered, which was, however, much lower than international standards, but yet which appeared lower than IT's standards." Is that right? My question is: Did international standards appear lower than IT's, even though they are supposedly higher than IT's? This doesn't make sense.

Thanks for your help!