This means your rank may drop 1 because how the ranking system works. If you don't already know how it works, the points are based on how many total maps are in the mapcycle.txt. So for example, if there are 100 surf maps listed, your rank is given on how many maps you completed. So to get a certain rank that requires 50% maps completed, you would need to do 50 maps out of 100. Now if there are more maps, the 50% is no longer 50 maps.

So with that explanation of how your rank could be 1 lower, here are the newly added maps.

T1

surf_bombix_v2 - stages
surf_colum_up -stages
surf_tui_1 - stages
surf_bricks - linear
surf_noob - stages

T2

surf_juturna - linear
surf_ace_fix - stages
surf_temple - stages
surf_hopi_easy - linear
surf_my_shit_b2 - stages
surf_generic - stages

T3

surf_cubic - stages
surf_wisdom - stages
surf_skyscrapers - linear

T4

surf_mephobia - stages
surf_se7en - stages
surf_bluewinter_final - linear
surf_a - stages

T5

surf_motion1_csgo - linear