Since you seem to have some confusion, with the breedings that took place (w/re. to Butter Stripe, etc.), here is a likely scenario:
Creamsicle Stripe female was bred to the Butter Stripe and to the Hypo Lavender. Resulting Hatchlings were Amel Stripes.
Thus, it was the Butter Stripe who was the father, of those hatchlings, and the Hypo Lavender male, who was also bred to her, just missed the window of fertilizing any eggs.
That means that the Hypo Lavender could not have been proven to be het Stripe and would explain why there weren't any Striped hatchlings, this year, when the Snow Stripe female was bred to the Hypo Lavender.
With the male Hypo Lavender not being het Stripe (but proven to be het Anery), you produced hatchlings (last year & this year) of a morph that would be expected...
Hypo Lavender het Anery x Ultramel(?) Anery = Hypo type and Hypo type Anery hatchlings.
Hypo Lavender het Anery x Snow Stripe (homo Hypo?) = Hypo type and Hypo type Anery hatchlings (which are het Stripe).