Gukan here is the final map of Bosnia, also with fixing those provinces with rivers which i had to add 3 more provinces, also added 2 more provinces (sorry had to do) and changed names for two provinces to be more correct.
The first map is with added provinces:
The second map shows where the changes have been made in alphabetical order, so it's easy for you to spot the changes:
A - I added province "Kosova" and the river is drawn in blue where it should go. I also got rid of the black line where it was dividing provinces "Novi Seher" and "Maglaj" previously.
B - You can see i divided "Cunista" province into two, adding "Solun" province.
C - For the river "Bosna" which coninues from Maglaj, i had to split the "Catici" province, bring "Catici" to the right side of the river and added "Mostre" province to the left. As you can see i've drawn the blue line where the river should go through.
D - I only had to change the name from "Konjevic Polje" to "Drinjaca".
E - For the "Srebrenica" province i just added "Potocari" province.
F - Where i pointed F is the province i just changed the name from "Zeleni Jadar" to more accurate name "Luka".
G - Like with A and C i had to split this province in three, adding one more province "Visici". The river is coloured blue and you can see where it should go through that part.
So this is all and hope that it should be fine now with the rivers and provinces. If you have any questions just ask, glad to help. I hope you understood this message...