Rockstar has patched the buggy multiplayer element of Red Dead Redemption, the full set of fixes include:

• Resolved various NAT incompatibility issues
• Improved connectivity to multiplayer for users with slower connections
• Improved reporting for Shootout and Gang Shootout games
• Fixed instance where Mo Van Barr would not appear as a bounty
• Fixed multiplayer titles not appearing for some users in the outfitter
• Fixed instance where lawmen stopped responding even though the player was wanted
• Fixed Issue with hogtied victims disappearing when ragdolled
• Fixed crash in Free Mode when cooking dynamite and going into the water
• Fixed audible glitch at the end of some cutscenes
• Fixed Solomon’s Folly Action Area not ending after posse leader teleports in late
• Corrected Social Club 100% Tracker so stats update properly
• Various multiplayer issues addressed including load screen hang-ups and UI glitches
• Eliminated miscellaneous game crashes