Dennison, of Dobson Place, Hartlepool, has also admitted having 450 prohibited images of children from March 28 last year and 102 extreme pornographic images.
He was due to be sentenced by Teesside Crown Court on Friday, October 16.
But the judge, Recorder Christopher Smith, adjourned it to a future date so inquiries could be made with the police about a computer server mentioned in the case papers including if other perverts had accessed any of the images on it.
Recorder Smith said: “There’s a vast quantity of material and I want to know what the defendant was doing with it.”
Read more: Hartlepool sex offender continued to download child abuse pictures and movies after jail let off
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