Going 7-10/day now translates to pain for you, right? Well, with the ileo, you just don't feel it... it just happens. NO pain!! Again, your output will be watery at first and will thicken in time. A lot of times food determines the consistency once your intestines "settle into their new life"!
I wear the same bag from one change to the next which is about 6-8 days. You don't have to change it unless you want to. I do, however, rinse mine out in the mornings with some cool water to clean it up for the day. Personal preference for me. Others don't. And you don't have to cuz it will get dirty again before you count to 1!!!
Some folks change their bag to a larger one for the nighttime hours, and to a smaller one during the day. Again, personal preference. I use a larger one all the time and just fold it up inside my panties - no one knows. If I need the extra space, then it is there. If I don't, then no worries.