From the Wikipedi article
Rawat in this speech attributed great power and possibly divinity to "The Lord, Guru Maharaj Ji", apparently referring to his father and teacher. The fact that Rawat himself also came to be called "Guru Maharaj Ji," may have led to confusion, whether intentional or unintentional, in the minds of Western followers between Rawat personally and this called-upon figure of divine power. It may be that during the 1970s as praise and divine connotations were further heaped upon "Guru Maharaj ji", those in charge maintained in their own minds a distinction between the young living man, his deceased father, and the lineage title itself, although that distinction appears to have been lost on many who believed Rawat was referring to himself when using that phrase. Critics assert that in their view there can be no doubt Rawat was both referring to himself and intending his followers to understand that. In the magazine "And It Is Divine", (January 1973, v 1, i3) he was quoted as saying when referring to the day he received the techniques of Knowdlege from his father:"...when I was born, God existed. But I never new Him. I just never knew Him until Guru Maharaj Ji came into my life, till Guru Maharaj Ji came in my way, and showed me and revealed me that secret. And the day he did that, there it was, I knew God."
The latest quote is from the image scanned by Hilltop in http://www.forum8.org/forum8/posts/7543.html and is used to prove that Prem Rawat refers to his father when using the words ''Guru Maharaj Ji''. I can not deny that he sometimes did refer to his father.