Alpha 32 & 33
To test the bug:
1) Build Dyndolod with Dll NG 32 or 33
2) Join the thieves guild and get your two first jobs from Delvin and Vex.
The bug appear for the ledger (
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quest marker not appearing and the ledger not activating as long as you save your game and reload the save before activating the ledger.
So to succeed the Numbers Job you shouldn't save and reload your game before activating the ledger.
I reinstalled Skyrim from scratch I tested the mods one after the other until I narrowed it to Dyndolod/Dll NG.
That was one of my suspicions since it was one of the mods I added in the latest weeks.