Hi Hitesh,
You should not update initial balance in this table directly, you have to maintain client, excise group, Entry date, material, packed form P or L & fill the last columns user name, date, time other than these no other details are required. Intial stock will be uploaded through the movement type 561. When you execute J1I5 with classification ROP System updates this table. When you run J2I6 the register will be extracted system updates actual J_1iRG1 tabel. if u r getting from 2nd only then check the entry date & table updated date J_2IRG1BAl table.
Lot of notes from SAP are there search in service market place. Refer the following link
How to get Opening & Closing Balance in RG1
I hope this solves the issue.
Regards,
S.Himavanth.