so when making a deck it says not to repeat parts, but some people have like 2 Sr in their deck and more than one 0 disk. 
So could someone clarify what a repeated part is?
And if you have 3 beys one with 0glaive, 0bump, and 0vortex, does that count as repeated parts?

so when making a deck it says not to repeat parts, but some people have like 2 Sr in their deck and more than one 0 disk. 
So could someone clarify what a repeated part is?
And if you have 3 beys one with 0glaive, 0bump, and 0vortex, does that count as repeated parts?

The repeated parts that dont have (deck finals only) are most likely just the combos they were using in the first stage. The final stage is typically the one that uses deck format, the first stage only requires 1 bey for every match. In deck format, you can still change your combos and beys in between matches so you may see different combos with repeated parts in the deck format stage. The combos labeled with (deck finals only) is the deck the player used for finals.

The disks you mentioned would be repeating parts

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95% of the time I spend on this site is on mobile

so when making a deck it says not to repeat parts, but some people have like 2 Sr in their deck and more than one 0 disk. 
So could someone clarify what a repeated part is?
And if you have 3 beys one with 0glaive, 0bump, and 0vortex, does that count as repeated parts?

keep in mind, there are several rounds of deck format finals (for winners)

so you might see what appears to be repeated parts in the wining combos posts
but those are winners from separate deck finals matches

the rule is very simple for deck finals matches:
3 beys - no repeated parts at all