We always say stick to your plan but sometimes our tummy is just not ready to move forward. It’s not unusual for people to go back a stage for a little longer. I mean we all heal in our own time line. In your case, maybe you do need a liquid stage. Worth giving it a go & seeing if it helps. Just watch your Protein. You may not get to your goal but as long as you’re close you’ll be okay.
I’d probably still contact your team to discuss your situation & struggles. They may suggest some other things you could try. Give yoghurt, thicker Soups, instant oats made on milk (add more milk to get it to a consistency you can tolerate), runny eggs (though some struggle with eggs), etc. a go which will give you protein unlike your potatoes & toast. These were a blessing to me.
No you have not stretched your pouch with just one 5 oz meal. Fact
In a few weeks your restriction will kick in. Your internal stitches and staples will have healed and you will begin to feel so full. Its easier then to know your signals. Now you need to look for sneezing or a runny nose as full signals. Thats why you are given the weights to stick to. You could tear your stitch line its so new.
It is often said on here, Just because you can does not mean you should