Yes it is.
vccv
"Distance" is a VCCV word, with the short vowel 'i' sound in the first syllable and the 'e' sound in the second syllable.
VCCV
vccv
Vccv
Yes. The syllables are split (is-ta) and both are short vowels or schwas.
vccv
vccv
popo
Vccv
vccv
A VCCV doublet is a sequence of two VCCV syllables in a word, whereas a VCCV is a syllable pattern where a single consonant precedes a vowel-consonant-vowel sequence. The main difference lies in the number of VCCV units present in a word: doublet involves two, while VCCV simply has one.