you for reaching out on the community and telling us about your issue. That is quite odd. Could you try a couple of things to see if it's consistent in other areas of the program. First I just want to double check to see if it also happens on a report. If you could go across the top and select reports -> Spending -> Itemized categories. From here could you double check to make sure that one of your split transactions are showing correctly and breaking it down. Next could you also take a screenshot of both your budget and the transactions that are split not entering correctly.
These things should help us get a start to see if it's consistent or not. Try it out and report back to us when you have a chance!