Lua Movement not removing monster from Area

[LucasFerraz]

Hello, why isn't this movement removing monsters from Area?

local function changetiles(cid, item, pos, fromPos)
    local kapos1 = {x=32515, y=31407, z=15}
    local kapos2 = {x=32516, y=31407, z=15}
    local kapos3 = {x=32515, y=31408, z=15}
    local kapos4 = {x=32516, y=31408, z=15}
    local kapos5 = {x=32515, y=31409, z=15}
    local kapos6 = {x=32516, y=31409, z=15}
    local kapos7 = {x=32516, y=31410, z=15}
    local kapos8 = {x=32515, y=31410, z=15}
    local kapos9 = {x=32515, y=31411, z=15}
    local kapos10 = {x=32516, y=31411, z=15}
    local kapos11 = {x=32515, y=31412, z=15}
    local kapos12 = {x=32516, y=31412, z=15}
    local kapos13 = {x=32515, y=31413, z=15}
    local kapos14 = {x=32516, y=31413, z=15}
    local check = {x=32515, y=31398, z=15}
    doCreateItem(598,1,kapos1)
    doCreateItem(598,1,kapos2)
    doCreateItem(598,1,kapos3)
    doCreateItem(598,1,kapos4)
    doCreateItem(598,1,kapos5)
    doCreateItem(598,1,kapos6)
    doCreateItem(598,1,kapos7)
    doCreateItem(598,1,kapos8)
    doCreateItem(598,1,kapos9)
    doCreateItem(598,1,kapos10)
    doCreateItem(598,1,kapos11)
    doCreateItem(598,1,kapos12)
    doCreateItem(598,1,kapos13)
    doCreateItem(598,1,kapos14)
    doRemoveItem(getTileItemById(check, 8020).uid, 1)
    doSendMagicEffect({x=32516, y=31408, z=15}, 2)
    doSendMagicEffect({x=32516, y=31409, z=15}, 2)
    doSendMagicEffect({x=32516, y=31410, z=15}, 2)
    doSendMagicEffect({x=32516, y=31411, z=15}, 2)
    doSendMagicEffect({x=32516, y=31412, z=15}, 2)
    doSendMagicEffect({x=32516, y=31413, z=15}, 2)
    doRemoveItem(getTileItemById(kapos7, 1387).uid, 1)
    return true
end

local c = {
    from = {x = 32522, y = 31429, z = 15},
    to = {x = 32540, y = 31450, z = 15},
    oldpos = {x = 32517, y = 31410, z = 15},
    boss_pos = {x = 32535, y = 31445, z = 15},
    player_pos = {x = 32525, y = 31438, z = 15},
    storage = 9933,
    boss = "Pythius The Rotten"
}

local function checkPlayers(from, to)
    local list = {}
    for x = from.x, to.x do
        for y = from.y, to.y do
            for z = from.z, to.z do
                local g = getTopCreature({x = x , y = y, z = z}).uid
                if isPlayer(g) then
                    table.insert(list, g)
                end
            end
        end
    end
    return list
end

local function checkMonsters(from, to)
    local list = {}
    for x = from.x, to.x do
        for y = from.y, to.y do
            for z = from.z, to.z do
                local g = getTopCreature({x = x , y = y, z = z}).uid
                if isMonster(g) then
                    table.insert(list, g)
                end
            end
        end
    end
    return list
end

function onStepIn(cid, item, pos, fromPosition)
    local t = checkPlayers(c.from, c.to)
    local m = checkMonsters(c.from, c.to)
    if getCreatureStorage(cid, c.storage) ~= 10 then
        if #t == 1 then
            doTeleportThing(cid, c.oldpos)
            doPlayerSendTextMessage(cid, MESSAGE_EVENT_ORANGE, getPlayerName(t[1]) .. ' is in the room now.')
            addEvent(changetiles, 0)
        else
            for i = 1,#m do
                if isMonster(m) then
                    doRemoveCreature(m)
                end
            end
            doCreateMonster(c.boss, c.boss_pos)
            doTeleportThing(cid, c.player_pos)
            addEvent(changetiles, 0)
        end
    else
        doPlayerSendTextMessage(cid, MESSAGE_EVENT_ORANGE, "You already done this quest.")
        doTeleportThing(cid, c.oldpos)
        addEvent(changetiles, 0)
    end
    return true
end

 

[Limos]

if isMonster(m[i]) then
    doRemoveCreature(m[i])