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
vccv
vccv
popo
Vccv
Yes. The syllables are split (is-ta) and both are short vowels or schwas.
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.