A request for an increase in credit limit should not take more than 24 hours since all your records are supposed to be intact and profiled as to the maximum credit limit it can afford however, since this system "upgrade" was implemented, a lot of things have not been normal. Check http://community.globe.com.ph/t5/General-Discussion/System-Upgrade-or-Downgrade/m-p/51865#M1903
It might even be faster if you apply for those 2 extra lines directly to a Globe Business Center (not online) bringing with you your updated documents in case they need proof or justification to approve those lines mentioning to them that you have a present account with Globe of good standing.
Your credit history would play a major part in having those 2 lines approved. Good luck.