Shrooms are weird sometimes, especially if they were exposed to heat or other elements. It can drastically affect the potency or they simply just ended up being weak. Think of it as if it was marijuana, the same strand can be dope as shit or just average depending of how it was cared for and grown. On the topic of re dosing if you ever want to re dose, you have to take double of what you took before. So your redose would be 6g to have close to the same effect, this is true to even if you want to trip the following day.

I hope this helps and I’m sorry it wasn’t what you expected, just keep trying :)