Not sure if it's a bug or not. Edit: It's not

[Zhunter5000]

EDIT: Not a bug false alarm, I saved, left and when I went back they caught up to me. Sorry for not thoroughly testing.
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I've noticed during the quest when you take back project purity only Liberty Prime, Lyons, and one other BS member (Don't remember the name) will follow you outside. This isn't a terrible bug, but I don't think it's something that should be happening. Though if it is then I can provide SS's, and stuff. There should be 5 other members joining you apart from Lyons.

LO: FalloutNV.esm
DeadMoney.esm
HonestHearts.esm
OldWorldBlues.esm
LonesomeRoad.esm
GunRunnersArsenal.esm
Fallout3.esm
Anchorage.esm
ThePitt.esm
BrokenSteel.esm
PointLookout.esm
Zeta.esm
TaleOfTwoWastelands.esm
YUPTTW.esm
CaravanPack.esm
ClassicPack.esm
MercenaryPack.esm
TribalPack.esm
Level100PerkPerLevel.esp
Unbreakable Weapons and Armor.esp

Total active plugins: 20
Total plugins: 20

[RoyBatty]

Level100PerkPerLevel.esp <- this mod is on the blacklist, because it recompiles all scripts and breaks TTW completely, get rid of it. There is a not broken one on the forum.

[Zhunter5000]

Level100PerkPerLevel.esp <- this mod is on the blacklist, because it recompiles all scripts and breaks TTW completely, get rid of it. There is a not broken one on the forum.

I forgot to mention I have the fixed one. Zach layton I think gave me it