I can't reproduce that - it seems to work OK for me. What version of MUSHclient are you using? There have been some fixes recently about the last colour carrying over under certain circumstances.
ANSI seems to bleed after a code like repeat is used (Example) ... [repeat(ansi(hm,te)[ansi(hg,st)],100)]
When the code string is done, most things after (Like pages) come up in the hg ansi color instead of MUSHclient evaluating it back to its proper color. No clue if this is known.. didn't have the time to skim through all the bug posts but if it is then well heres another case of running into it.
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