I use the cheaper Quilted Northern which is septic safe and which I have tested. (There is a more plush quilted Northern which is NOT septic safe.) I think the problem was they were trying to conserve water and did not understand that we had to conserve water in sinks and showers, but not the toilet, which needs a lot of water. I should have explained more, but with three little kids running around and asking for stuff constantly, it was a very hectic weekend. (I would NOT recommend that anyone have three kids in 37 months! ALL need help with clothing and shoes and food and wiping, etc. To say nothing about staying out of traffic and getting off the campground road when a car comes.)
I know I need to add a lot of water to break it up, but I am conflicted because I also need enough space in there for the next few days to actually use it. No paper of any kind down the toilet until I get the mess in the bottom cleaned up. When I am by myself, I add a LOT of water and almost no TP, so have not had problems since my original "situation" last September.
Sloshing around today did not help much, but at least it is usable and I did see some little bits flowing out when I dumped. I will not dump it again for as long as I can manage. I now have enough room in it at least so that I can add more water. It is still not registering on the sensor panel, however, which leads me to believe I am still not adding enough water.
I am lucky in that both of my sons are very hands-on with their kids. In fact, the older son is the major caregiver since his wife works much longer hours than he does (and makes more money), so he is in charge of breakfast, and baths and bedtime, dropping off and picking up kids, and a lot in between. He even took off three months of parental leave for the second baby because his wife could not be replaced easily on her job as a vice-principal of a high school.