Acers left out of leas

I will try to keep this short, in 2016 I signed a lease with EQT on my 24 acers in 2020 they put 4 acers in a unit also in 2020 the re signed{sent me a check} for what I thought was the remaining acreage 19 but the amount was no right so after going back and forth for a few months it seems they only paid me for 11 of my remaining acers [which are not in a unit yet] without asking me or even signing a new lease. My question is seeing that they leased all of my acreage the first time don’t they have to reup my remaining acers? Tom