Changed allowances 1 to 0

Hello there world, Fist post so please be kind....

 

Last year I changed my allowances/witholdings form 1-1 to 0-0 (early Jan 2023)...my son is no longer a dependant.

 

I made roughly $3060 more this year than last year. However less money was witheld for the year.  (looking at 12/22  vs 12/23 paystub)....This doesn't make sense to me.  

I've made no other changes to income or investments/retirement contributions

Does anyone know what I'm missing?

 

Thanks for your time