Travel Management Advance Posting with special GL indicator

Dear Experts,

I'm facing an issue with travel management advance posting using special GL indicator, actually here delta posting is not working everything else is fine. What I'm trying to say here is while posting for FI, the advance amount is not being adjusted with travel expenses instead it is being added up with that amount, please find below the screenshots for more reference.

I've checked all the notes related to this and also the configuration wise everything is fine, kindly help if somebody has faced the similar scenario anytime.

Here in above case the highlighted 1000 amt should have been adjusted with 10000 and it should be adjusted with HRV on the other side, kindly help