So many chemicals and here I go suggesting another one however you should be able to get rid of some of the others at the same time.
According to the instruction from Jungle if using Jungle pH Decreaser you will need to use Jungle pH Stabilizer to maintain desired pH.
I only mention this because I do not see the product listed on your above list.
I have been reading up on pH buffers and such and have read usually there are two chemicals involved (decreaser and stabilizer) when micromanaging or adjusting your pH, which you are trying to do, rather then just one. If one one is used you will see exactly what you are seeing at the moment, your water will re adjust back to its natural state.
Prime and Aquasafe are they not both tap water conditioners? I would choose one such as Prime and stop with NitroBan and Aquasafe, as long as the water is changed regularly, the java moss should soak up any nitrates.
Not sure what the salt is for, but I have no experience with Betta. Perhaps it is need for something the Prime is not providing?
If you are able to correct the pH by combining the Jungle Decreaser and Stabilizer, I would remove the Almond Leaf Extract also.
So if using Prime to detoxify your water and add slime coat protection first, then use Jungle Decreaser and Stablizer to adjust the pH to the desired level. You really should be good to go.
Hope this helps.