You're probably suffering from a rare (Not really
) glitch where your character info and such are snapped back to the previous session's login state. Basically:
Session 1: Login at point 1 with inventory loadout 1, Logout at point 2 with loadout 2
Session 2: Login at point 2 with loadout 2, glitch is set in motion, Logout at point 3 with loadout 3
Session 3: Login at point 2 with loadout 2, Logout at point 4 with loadout 4
Session 4: Login at point 2 with loadout 2, Logout at point 5 with loadout 5
Session 5: Login at point 2 with loadout 2, Logout at point 6 with loadout 6
And so on and so forth.