Looking at your pictures helps a great deal. There is a small subset of people who benefit from a mini tummy tuck to the extent that they might desire to benefit. In most people, and in your pictures I would guess you fit into the most people category, a full tummy tuck can provide the most dramatic results. Mini TT is best left for those people without enough skin to do a full tummy tuck. The advantage you did benefit from, however, is an easier recovery. I do think a full TT would allow the opportunity to tighten your muscles more and get out the extra skin. I would wait at least 6 months after you initial surgery but a year or longer would be ideal.
Thanks for the excellent series of posted photos. Your case demonstrates the risks of doing a mini TT vs a Full TT. You should have been informed that the mini NEVER achieves a flat flat appearance pre operatively. Thus you fall in this category. The result though very conservative is still a result and you did not have the longer healing time with a full TT and added expense. I might recommend aggressive exercise and diet to help flatten..
You were a candidate for a full tummy tuck. I am not a fan of the Minis. You now need to have a full tummy tuck and yes it is very possible. My Best, Dr C
Based on your photos you were a candidate for a Full Tummy Tuck and not a Mini Tummy Tuck. It is not possible to get the results you desire with a mini tummy tuck.
The bulge is definitely do to a failure of muscle repair, After pregnancies your have muscle separation and if there not repair by a tummy tuck procedure you would alway have the prominent abdomen.