MU seems not yet give up in signing Mbeumo. After their first offer rejected by brentford. They're coming back with bigger offer, which is worth more than £60m for Mbeumo. Their first offer was £45m + £10m adds on, which far less than their second big.
However, i'm still doubting them to secure Mbeumo's sign as their second offer is still below what Brentford wanted.

I only feel so weird they sign more players while they have not yet offload some of their players.

If Brentford says no for their second offer, they must go away. They can also use Semenyo (Bournemouth) as alternative choice over Mbeumo.