Beating hard mode in... nightmare??? (EXPLANATION IN DESC)

So I joined a random server thinking it was normal. suddenly a random boss noob 2.0 spawned too early. Turns out I somehow joined a server with a rare bug (where there can be 2 modes at once) It was bossrush also. however when it ended hard mode kept going for some reason which we players chose nightmare(For grinding stuff) and then suddenly it was literally hard mode + Nightmare at the same time with hard mode being on wave 30. Infact hard mode gave us so much money we just can spawn at wave 15. and in the video we reached wave 40 where boss noob 2.0 pays a visit which was funny. But after we killed boss noob 2.0 the game somehow ended. Btw the reason why the top is cropped is because robloxs recording thing is like that(My recording app sadly broke)