Reading public posts containing identical publish timestamps return duplicated items

[Davide Ficano]

Using the signed version of /posts can return duplicated items, with identical publish timestamp, when they "cross" the offset boundary.

For example setting the offset parameter to 2 the following items are returned in this shown below order

id 1 timestamp 100
id 2 timestamp 100
id 3 timestamp 100
id 4 timestamp 100
id 5 timestamp 100

Call 1

id 1 timestamp 100
id 2 timestamp 100

Call 2

**id 2 timestamp 100**
id 3 timestamp 100