Loadout not always available?????

Whats up everyone. I have been away from halo 4 for a few months, maybe more, anyway I have noticed that in BTB, there are some new maps, also about 50% of the time my loadout is not available, does anyone know why? Thanks.

Are you noticing a difference in gametype name?
Most importantly Infinity Slayer and Team Slayer.

Ive noticed that even though im playing BTB, sometimes the same map shows up and one name says big team and one says infinity slayer, I dont believe it was like this at release as I never remember the same maps with different names before, I also never had an issue with my loadouts. Thanks.

Tis OK.

Infinity Slayer was never meant to completely replace Team Slayer.

http://blogs.halowaypoint.com/Headlines/post/2012/06/13/The-Halo-Bulletin-61312.aspx
Is Infinity Slayer a replacement for normal Slayer? -pedrocs21

No. Infinity Slayer is an added, but vital mode.

It may have felt that way with the initial playlist settings but though some may like to believe otherwise, it takes a long time to balance things for both gameplay wishes and community wishes. And with that, it does take a bit of R&D to get non-community specific settings just right.

Having said that, look for Infinity Slayer and Team Slayer in the Big Team Infinity Slayer playlist with IS, TS, Legendary Slayer and Slayer Pro in the Infinity Slayer playlist.

Each gametype has its own set of rules and of those, only Infinity settings allow for personal loadouts.