Better ask their support directly.
It would be unfortunate if your account were to be frozen, due to going over the limit cause of faulty second hand info.
Who knows if individual account limits are reinforced by their system. You could be going over your limits and breaking TOS unknowingly.
Dunno about withdraw limits but this is for instant buy limits. >
https://community.coinbase.com/t/instant-buy-weekly-limit/9965 Again, ask them directly.