can we be taxed on land we don't own in the state of Maine. we pay property tax on our land but more was added on for a use tax

we have a cottage in Maine and pay our property tax each year. This year we were told the taxes have been reduced for the property owner of the land we have use of for traditional and recreational purposes. they are now taxing us more for the use of the other property owners land and have reduced their taxes and increased ours to make up for it. Is this legal? our deed says we have to pay the owners a maintainance fee for the use of the land.....Can the town just take it upon themselves to do this.