That is not normal.
I went through the initial setup process on a Yuasa yesterday, following their instructions to a "T". Added the electrolyte, gave it 20 minutes to empty, gave it 2 hours to absorb, then charged at 1.8 amps for 7.5 hours (they specify 5 to 10 hours at that amperage if using a constant current charger). After giving it the appropriate minimum time after charging to drop in voltage, its open-circuit rest state is now 12.8 volts. That's an actual 100% charge, despite what certain people looking to argue with everyone on the internet might think.
