(CLV) Lv 23:6
And on the fifteenth day of this month is the festival of unleavened bread to Yahweh. Seven days shall you eat unleavened bread.
(CLV) Lv 23:7
On the first day you shall come to have a holy meeting, when you shall do not occupational work at all.
(CLV) Lv 23:8
And you will bring near a fire offering to Yahweh seven days. On the seventh day is a holy meeting, when you shall do not occupational work at all.
(CLV) Lv 23:9
Yahweh spoke to Moses, saying:
(CLV) Lv 23:10
Speak to the sons of Israel, and you will say to them, When you come into the land which I am giving to you and reap its harvest, you will bring a sheaf of the firstfruit of your harvest to the priest.
This is Bikkurim.
(CLV) Lv 23:11
He will wave the sheaf before Yahweh for acceptance on your behalf. From the morrow of the sabbath the priest shall wave it.
From the morrow of the Shabbat. This is the first day of the week, no? The day after Shabbat? How could YHWH be calling day 1 of Hag Matzot the Shabbat in this case?
Let's test by my understanding Let's call this day one in out count, the first day of the week.
If you wish to put together a proof which fits your understanding; I'll be happy to review it.
(CLV) Lv 23:12
On the day when you cause the sheaf to wave you will offer a flawless year-old he-lamb as an ascent offering to Yahweh,
(CLV) Lv 23:13
together with its approach present of two tenths of an ephah of flour mingled with oil, a fire offering to Yahweh, a fragrant odor, and its libation of wine, a fourth of a hin.
(CLV) Lv 23:14
Not bread or toasted grain or groats of the new crop shall you eat until this very day, until you bring- the approach present of your Elohim. It shall be an eonian statute throughout your generations in all your dwellings.
(CLV) Lv 23:15
You will count off for yourselves from the morrow of the sabbath, from the day you bring the sheaf of the wave offering: there shall be seven flawless sabbaths.
Let's count from day one.
1,2,3,4,5,6,7 Shabbat
1,2,3,4,5,6,7 Shabbat
1,2,3,4,5,6,7 Shabbat
1,2,3,4,5,6,7 Shabbat
1,2,3,4,5,6,7 Shabbat
1,2,3,4,5,6,7 Shabbat
1,2,3,4,5,6,7 Shabbat
7X7=49
(CLV) Lv 23:16
Until the morrow of the seventh sabbath you shall count off fifty days; then you will bring near an approach present of new grain to Yahweh.
The first day of the week (day 1, one day,)
7X7=49+1=50