safety in OT

[whitehat]

Just doing some thursday night review prior to friday. looking at rulebook page 88 second full para. "If a safety is scored by the offensive team, the succeeding spot will be the 10 yard line in possession of the team that was on defense...and the score will be A-2, B-0"

Trying to imagine this scenario in a game situation. B somehow forces the ball into their own EZ, and recovers..safety. OK. Now it is Bs ball for their OT series as A leads 2-0..if I follow this correctly. So now B scores a TD and they win the game right? Isn't A being punished by having to end their possession/series due to B having a safety scored against them? it seems that instead of A being able to go ahead and finish their series and possibly score a TD, they have to settle for 2 points instead of 7 or 8...can someone clarify this for me...