No, your original deposit remains on the same term timeline, and each time you add money a separate savings program is created. Note that different term lengths have different minimum requirements, which are $1,000 for the 1-year term and $5,000 for the 2- and 5-year terms. Additionally, because each program's investments have different start dates, they each will have different end dates.
For example: If you deposit $1,200 for a 1-year term in Oct. 2022, your term will end in Oct. 2023. If you decide to deposit again in Dec. 2022 for a 2-year term with $5,500, then your term will end in Dec. 2024.