Consonant cluster clarification

[Pierre Abbat <phma@oltronics.net>]

Chapter 3 says:

In Lojban, doubled consonants are excluded altogether, and clusters are limited
to two or three members, except in Lojbanized names.

It appears to me that all stage 3 fu'ivla formed from a CVCCV gismu violate
this rule, for instance "jinmrtitani" has the four-consonant cluster "nmrt" in
it. So is the rule actually that consonant clusters can have up to three
consonants in a row between syllabic consonants?

phma