You weren't confusing, butterfly, just the extra detail helps :)
"She born on Wednesday 15th June weighing 7 lb 15 oz. On Saturday 18th she had lost just over 7% I think, and weighed 7 lb 6. The midwife wasn't worried as it's normal."
Well within normal.
"By Monday 20th dd had gained 60 g which midwife said was good"
Spot on :)
"but when she was weighed on Friday she hadn't gained any more."
OK - then it makes sense for the bf to be looked at....more frequent feeding, using BOTH sides at least every time, if poss.
"if dd hasn't gained any more by tomorrow she wants us to top her up with formula"
It does not need to be formula if it's thought she is not getting sufficient. It can be your own breastmilk - either by feeding her even more often, or by expressing and giving her the extra after a 'direct' bf.
"a lot of her poos are still the ones that look like they have seeds in but she said they shouldn't be like that now"
No - seeds are normal! Most babies have seeds in their poo a some stage - they're just tiny bits of undigested milk, and not a problem at all. Do check with the midwife again.
Poo is not normally brown at this stage, but sometimes the yellow has a mustardy tinge to it :)
If the midwife is concerned because your baby is not getting sufficient calories, then this is easily resolved - get more breastmilk into her :) Ask her why formula at this stage, unless there is a clear indication she is not transferring milk well....and it does not sound like that is an issue.