Split costs of a transfer

my bank wants me to split costs of the transfer between me and the bank where I will transfer money to invest on your site. and my question is whether this isn’t a problem ?

do you need to transfer banks to do this? surely you can just deposit straight from your current one? or are you talking about transferring an ISA?

My bank doesnt let me chose option: „i cover all the costs of the transaction.” It suggests me to apply option: „costs of the transaction will be shared (between me and 212).” Isnt that a problem?