When an ileostomy is first performed the output tends to be high for anything up to the first 3 months. This is because the colon, which is the area that liquid is absorbed from waste, is no longer in use and so the small bowel has to learn to take over this work and this takes time.
Orange juice and any sugary fruit juice or drinks will speed things up and so produce more output, this is turn will dehydrate the system. Stick to water, sugarfree drinks, caffeine free tea/coffee and also be careful with fat intake as when I had my loop ileo it didn't like high fat content and would respond with high output. Also the tomato sauce on your pasta could cause things to whizz through, if I eat tomato pasts sauce or soup or drink tomato juice it comes straight out in 30 minutes.
So try to reduce your liquid intake, reduce fat intake (fried breakfast, pizza, cheese) and reduce sugar intake. Things will settle down but in first few weeks they can be a bit all over the place.
I produce over 2 lts a day as I have short bowel syndrome and high output. I've just got used to it but manage to go 8 hours most nights without needing to empty.
Crohn's dx 1989, loop ileo 1992, end ileo 1992. Arthritis developed 1990 Stoma abcess 1995. Azathioprine started 1995. Panprocolorectomy 1999. Stillbirth 2000, antiphospholipid syndrome dx 2000. Flare up 2004, stoma abcess and strictoplasty 2004. Low blood pressure dx with impaired kidney function 2006, fludrocortisone pres. flare up 2010, azathioprine, codeine, immodium, simethicone.